WO2003090929A1 - Corps structurel ceramique en nids d'abeille et procede pour produire le corps structurel - Google Patents
Corps structurel ceramique en nids d'abeille et procede pour produire le corps structurel Download PDFInfo
- Publication number
- WO2003090929A1 WO2003090929A1 PCT/JP2003/004622 JP0304622W WO03090929A1 WO 2003090929 A1 WO2003090929 A1 WO 2003090929A1 JP 0304622 W JP0304622 W JP 0304622W WO 03090929 A1 WO03090929 A1 WO 03090929A1
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- WO
- WIPO (PCT)
- Prior art keywords
- honeycomb structure
- ceramic honeycomb
- ceramic
- structure according
- outer peripheral
- Prior art date
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 138
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 238000005192 partition Methods 0.000 claims abstract description 74
- 230000002093 peripheral effect Effects 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 239000012744 reinforcing agent Substances 0.000 claims description 65
- 239000000463 material Substances 0.000 claims description 53
- 150000001875 compounds Chemical class 0.000 claims description 34
- 238000010304 firing Methods 0.000 claims description 32
- 229920002545 silicone oil Polymers 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 25
- 230000007423 decrease Effects 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 13
- 229910010293 ceramic material Inorganic materials 0.000 claims description 13
- 239000004927 clay Substances 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 229910052878 cordierite Inorganic materials 0.000 claims description 7
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- -1 methylcell mouth Polymers 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 239000012745 toughening agent Substances 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 3
- 150000001241 acetals Chemical class 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 3
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 3
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 3
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 3
- 241000233855 Orchidaceae Species 0.000 claims description 2
- 239000002966 varnish Substances 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims 1
- 230000003628 erosive effect Effects 0.000 abstract description 32
- 238000009924 canning Methods 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 29
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- 239000012779 reinforcing material Substances 0.000 description 11
- 230000035939 shock Effects 0.000 description 10
- 239000002002 slurry Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
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- 239000000654 additive Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 229920000609 methyl cellulose Polymers 0.000 description 4
- 239000001923 methylcellulose Substances 0.000 description 4
- 235000010981 methylcellulose Nutrition 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
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- 238000011156 evaluation Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
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- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 2
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- KAKVFSYQVNHFBS-UHFFFAOYSA-N (5-hydroxycyclopenten-1-yl)-phenylmethanone Chemical compound OC1CCC=C1C(=O)C1=CC=CC=C1 KAKVFSYQVNHFBS-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 241000238876 Acari Species 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229910026551 ZrC Inorganic materials 0.000 description 1
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 210000003899 penis Anatomy 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Definitions
- the present invention relates to a ceramic honeycomb structure and a method for manufacturing the same.
- the present invention relates to a ceramic honeycomb structure having a porous structure, and a method for producing the same. More specifically, the present invention has excellent erosion resistance at the end face of a honeycomb and balances properties such as purification performance and canning property.
- TECHNICAL FIELD The present invention relates to a ceramic honeycomb structure having excellent characteristics, particularly suitable as a carrier for an automobile exhaust gas purifying catalyst, and the like, and a method for producing the same. Background art
- Ceramic honeycomb structures widely used as catalyst carriers for exhaust gas purification, etc. are required to have higher purification performance in order to comply with stricter exhaust gas regulations year by year. Due to demands for higher output, etc., reduction of pressure loss is also required.
- the opening ratio at the cell opening end face of the honeycomb structure is increased to reduce the pressure loss, and the heat capacity of the partition walls is reduced to thereby reduce the heat capacity of the partition walls.
- a honeycomb structure base material containing a cordierite forming material as a main component is fired, and then the cordierite forming material is applied to a partition wall present at the cell opening end of the base material.
- a method of drying and firing is known (for example, see Patent Document 1).
- the partition wall reinforcing material tends to settle or coagulate due to its physical properties, and the dispersibility of the partition wall reinforcing material tends to be insufficient.
- the degree of reinforcement was likely to be uneven or uneven. For this reason, in this manufacturing method, it is not possible to stably obtain a ceramic honeycomb structure having uniform erosion resistance for the entire partition wall reinforcing portion, or the management burden for uniformly dispersing the partition wall reinforcing material is increased. Then there was a problem.
- the compressive strength (isostatic strength) at the time of the honeycomb structure is significantly reduced, and the honeycomb structure may not be able to withstand practical use. Has become.
- the present invention has been made in view of the above-described problems of the related art, and an object thereof is to provide a ceramic 82 cam structure.
- a ceramic honeycomb structure that has excellent erosion resistance for the partition walls existing at the cell opening ends of the body, and has high compressive strength (isostatic strength) during canning, and is particularly suitable as a carrier for automobile exhaust gas purification catalysts.
- An object of the present invention is to provide a body and a method for manufacturing a ceramic honeycomb structure. Disclosure of the invention
- the present invention is composed of a plurality of cells serving as a flow path of a fluid partitioned by a porous partition wall, and includes an inflow end where the fluid flows in, and an outflow end where the fluid flows out.
- a ceramic honeycomb structure having an outer peripheral portion including an outer peripheral surface as each part, wherein a porosity per unit volume (cm 3 ) is from the inflow end to the outflow end.
- a ceramic honeycomb structure (first invention) having a structure that gradually increases at a rate of 2% Zmm or less.
- the porosity per unit volume (cm 3 ) gradually increases from the inflow end to the outflow end at a rate of 0.1% Zmm or less. .
- the present invention is composed of a plurality of cells serving as a flow path of a fluid partitioned by a porous partition wall, and has an inflow end where the fluid flows in, and an outflow end where the fluid flows out.
- a ceramic honeycomb structure having, as respective portions, an outer peripheral portion including an outer peripheral surface, wherein a porosity per unit volume (cm 3 ) is from a central portion of a cross section perpendicular to a flow path of the cell to an outer peripheral portion. In the direction of 0.2% / mm or less.
- a ceramic honeycomb structure (second invention) characterized by the following. .
- the present invention has a structure in which the porosity per unit volume (cm 3 ) gradually decreases from the center of the cross section perpendicular to the cell flow path to the outer periphery at a rate of 0.1% / mm or less. Preferably.
- the porosity per unit volume (cm 3 ) in a range from the flow end face on the inflow end side to 150 mm in the flow direction is 10 to 50%. Is preferred.
- the partition walls preferably have a minimum partition wall thickness of 0.030 to 0.76 mm, and include cordierite, alumina, mullite, silicon nitride, aluminum nitride titanate, zirconia, and silicon carbide. It is preferable to be constituted by at least one ceramic selected from the group consisting of
- the cross-sectional shape perpendicular to the flow channel is preferably a circle, an ellipse, an ellipse, a trapezoid, a triangle, a quadrangle, a hexagon, or a bilaterally asymmetrical deformed shape.
- the cross-sectional shape is a triangle, a quadrangle, or a hexagon.
- the ceramic honeycomb structure of the present invention is preferably used for a carrier for an automobile exhaust gas purifying catalyst.
- a catalyst component is supported on a partition wall, and is held in an outer peripheral surface of an outer wall to be incorporated in a catalytic converter. preferable.
- a base material which is a dried body having a honeycomb structure is obtained using a clay mainly composed of a ceramic material, and the base material includes Si, Ti, Mg, and A.
- a method for manufacturing a ceramic honeycomb structure comprising: attaching and impregnating a reinforcing agent containing a compound having at least one element selected from the group consisting of at least one element in its structure as a main component, followed by firing. Three inventions) are provided.
- a base material which is a dried body having a honeycomb structure is obtained by using a kneaded material mainly composed of a ceramic material, and the base material is fired to obtain a fired body.
- S i, T i, M g, and A 1 after adhering and impregnating a reinforcing agent mainly composed of a compound having in its structure at least one element selected from the group consisting of:
- a fourth aspect of the present invention provides a method for manufacturing a ceramic honeycomb structure characterized by the following. 03 04622
- the above-mentioned compound generates an inorganic oxide by burning, and it is further preferable that the compound has a siloxane bond.
- the above-mentioned compound is preferably a silicone oil, a silicone penis, an alkoxy oligomer, or a mixture thereof.
- the toughening agent preferably has an absolute viscosity of 1 to 1000 OmPas.
- the ceramic material is preferably a cordierite-forming raw material
- the clay preferably contains a water-soluble organic binder.
- the water-soluble organic binder comprises at least one water-soluble compound selected from the group consisting of hydroxypropylmethylcellulose, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, polyvinyl alcohol, and polyvinyl acetal. Is preferred. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a schematic side view illustrating the sampling points (A to E) of the ceramic honeycomb structure.
- FIG. 2 is a schematic diagram of a cross section orthogonal to the cell flow direction, illustrating a sample collection site (F to J) of the ceramic honeycomb structure.
- FIG. 3 is a graph in which the porosity (%) is plotted with respect to a sample collection site (mm) for the ceramic honeycomb structures manufactured in Examples and Comparative Examples.
- 4 (a) to 4 (c) are explanatory views schematically showing one embodiment of the ceramic honeycomb structure of the present invention (first invention), and FIG. 4 (a) is a perspective view, Fig. 4 (b
- FIG. 4 (c) shows a side view.
- FIG. 5 is a partially enlarged view schematically showing another embodiment of the ceramic 82-cam structure of the present invention (first and second inventions).
- FIG. 6 is an explanatory diagram schematically showing an example in which the ceramic honeycomb structure of the present invention is incorporated in a converter case.
- FIG. 7 is a graph showing the conditions of the engine speed in the erosion test.
- FIG. 8 is an explanatory diagram schematically showing a method of measuring the erosion amount.
- One embodiment of the ceramic honeycomb structure of the present invention is composed of a plurality of cells serving as a flow path of a fluid partitioned by a porous partition wall, and an inflow end into which the fluid flows. And a ceramic honeycomb structure having an outflow end from which a fluid flows out and an outer peripheral portion including an outer peripheral surface as respective portions.
- the porosity per unit volume (cm 3 ) is from the inflow end to the outflow end. It has a structure that gradually increases at a rate of 0.2% Zmm or less toward the part side.
- FIGS. 4A to 4C are explanatory views schematically showing one embodiment of the ceramic honeycomb structure of the present invention (first invention).
- (a) is a perspective view
- FIG. 4 (b) is a plan view
- FIG. 4 (c) is a side view
- the ceramic honeycomb structure 1 is composed of a plurality of cells 3 partitioned by a porous cell partition 2, a cell opening end 5 (inflow end) into which fluid flows, and a cell opening end through which fluid flows out. 5 (outflow end) and an outer wall 4 as each part.
- the porosity per unit volume (cm 3 ) is lower at the inflow end side than at the outflow end side. It has a fine microstructure.
- reference numeral 10 denotes an end face of the opening.
- the ceramic honeycomb structure of the present embodiment is used as a catalyst carrier for purifying exhaust gas, and has a higher porosity per unit volume (cm 3 ) on the side (upstream side) where the exhaust gas to be treated enters. Assume that a low inflow end is used. This place In this case, even if foreign matter (such as oxide scale) present in the exhaust gas collides with the partition wall, the porosity per unit volume (cm 3 ) of the partition wall is lower than that of the partition wall located downstream. It is hard to damage because of its rate, and has an effect when the erosion phenomenon is suppressed.
- the porosity per unit volume (cm 3 ) of the ceramic honeycomb structure of the present embodiment increases from the inflow end side to the outflow end side. It is preferable to have a structure that gradually increases at a rate of 0.1% / mm or less.
- One embodiment of the second invention comprises a plurality of cells serving as a flow path of a fluid partitioned by a porous partition wall, wherein an inflow end into which a fluid flows, and an outflow end through which a fluid flows out And a peripheral portion including an outer peripheral surface as a portion.
- the porosity per unit volume (cm 3 ) is from the center of the cross section perpendicular to the cell flow path to the outer peripheral portion. It is characterized in that it has a structure that gradually decreases at a rate of 0.2% Zmm or less. The details will be described below.
- the outer peripheral portion of the ceramic honeycomb structure of the present embodiment has a lower porosity per unit volume (cm 3 ) than the central portion, that is, has a finer microstructure. Therefore, as compared with a ceramic honeycomb structure having a reduced porosity as a whole, there is an effect that problems such as an increase in heat capacity due to an increase in the mass and a decrease in catalyst supportability are less likely to occur.
- the ceramic honeycomb structure of the present embodiment is used by being carried (canned) on an appropriate holding container, holding jig, or the like.
- the porosity per unit volume (cm 3 ) at the outer periphery that comes into contact with the holding container, holding jig, etc. is lower than that at the center, so that it has sufficient isostatic strength.
- the holding container, the holding jig, and the like surely carry the holding surface, and have an effect that defects such as damage due to the load of the compressive surface pressure hardly occur.
- the term “isostatic strength” as used in the present invention refers to the strength indicated by the pressure value at the time of breakage in a test in accordance with the automotive standard JAS II standard M505-87.
- the porosity per unit volume (cm 3 ) of the ceramic honeycomb structure from the center of the cross section perpendicular to the cell flow path is reduced. It is preferable to have a structure that gradually decreases at a rate of 0.1% / mm or less toward the outer peripheral portion.
- the ceramic honeycomb structure according to the first and second embodiments of the present invention is considered to be mainly used as a catalyst carrier or the like for purifying exhaust gas, from the viewpoint of catalyst supportability and isostatic strength.
- the porosity per unit volume (cm 3 ) within a range of 150 mm from the flow end face on the inflow end side toward the inside of the flow path is preferably 10 to 50%, It is more preferably from 15 to 45%, particularly preferably from 20 to 40%.
- the thickness of the partition walls there is no particular limitation on the thickness of the partition walls, but the pressure loss is reduced while the warming-up is performed by reducing the weight and reducing the heat capacity. It is preferable that the partition walls be thin from the viewpoint that the purification performance of the partition walls can be improved.
- the minimum partition wall thickness is preferably from 0.030 to 0.076 mm, More preferably, it is 0.30 to 0.065 mm.
- the minimum partition wall thickness is 0.050 mm or less, there is a possibility that the partition walls may be deformed. Is extremely low.
- the thickness of the cell partition wall 2a on the outer peripheral portion side is also preferable to increase the thickness of the cell partition wall 2a on the outer peripheral portion side as shown in FIG. 5 from the viewpoint of improving the erosion resistance.
- the isostatic strength is improved, and the gripping force at the time of canning can be increased, so that the canning property is also improved.
- the isostatic strength is a strength indicated by a pressurized pressure value at the time of destruction by a test based on the automotive standard JASO standard M505-87.
- FIG. 5 there is an outermost peripheral cell 8 closest to the outer wall 4, and a second cell 9 is continuous inward from the outermost peripheral cell 8.
- the wall thickness of the outermost peripheral cells in T r 1 also shows the wall thickness of the second cell 9 at T r 2 from the outermost cell Le 8 inwardly.
- Tr 15 the thickness of the partition wall of any of the cells in the fifth to fifteenth ranges is represented by Tr 15 .
- the cell partition 2 is roughly classified into an outer cell partition 2a and a basic cell partition 2b.
- the outermost cell is a starting cell, and any of cells in the third to twentieth ranges located inside the starting cell is an end cell and an end cell.
- the value [(Tr ⁇ T r 3 ⁇ 2.) / Tc] is 1. Ru der less than 10 does not contribute to improvement of erosion resistance, Kiyaningu properties because it does not contribute to the improvement of ⁇ isostatic strength Does not contribute to the improvement of If it exceeds 3.00, the heat capacity and the pressure loss increase.
- each of the cell partition wall thicknesses (Tr, Tr 3 to 2 ) is set between the basic cell partition wall thickness (Tc) and 1. 10 ⁇ (T r t, T r 3 ⁇ 2.) / Tc ⁇ 2. 50, even 1. 20 ⁇ (T r have T r 3 ⁇ 2.) so as to have a relationship of XT c ⁇ 1. 60 It is practically preferable to further limit the conditions in consideration of heat capacity and pressure loss.
- the ceramic honeycomb structure according to the first and second embodiments of the present invention includes, for example, at least one kind selected from the group consisting of cordierite, alumina, mullite, silicon nitride, aluminum titanate, zirconia, and silicon carbide. It is composed of ceramics.
- the cross-sectional shape of the ceramic honeycomb structure according to the first and second embodiments of the present invention which is perpendicular to the flow path, is, for example, a circle, an ellipse, an ellipse, a trapezoid, a triangle, a quadrangle, a hexagon, or a bilaterally asymmetric variant. Shape can be mentioned. Among them, any one of a circle, an ellipse, and an ellipse is preferable.
- the cross-sectional shape of the cells of the ceramic honeycomb structure according to the first and second embodiments of the present invention which is perpendicular to the flow path, may be a polygonal shape of a triangle or more, such as a square, a rectangle, or a hexagon. .
- triangles, squares, or hexagons Preferably, it is either one.
- the use of the ceramic honeycomb structure of the first and second embodiments of the present invention is not particularly limited, and it can be used for various uses such as various filters and catalyst carriers. Is particularly preferred. Further, it is preferable that the ceramic structure of the first and second embodiments of the present invention is used by being incorporated in a single catalytic converter container 11 as shown in FIG. Here, the ceramic honeycomb structure 13 is incorporated in the catalytic converter container 11 by being gripped by the ring 12 on the outer peripheral surface thereof. There is no particular limitation on the material or the like that constitutes the ring 12, but usually a metal mesh is used. It is preferable that a holding member 14 such as a mat or a cloth is interposed between the catalyst converter container 11 and the outer peripheral surface of the ceramic honeycomb structure 13.
- One embodiment of the third invention is a method for manufacturing a ceramic honeycomb structure having the above-described characteristics, and includes a honeycomb structure using a kneaded material containing a ceramic material as a main component and having a honeycomb structure before firing.
- the productivity is improved and the cost is reduced. be able to.
- the porosity of the obtained ceramic honeycomb structure is gradually increased (gradually reduced), that is, an element contributing to the improvement in strength, specifically, at least one selected from the group consisting of Si, Ti, Mg, and A1.
- a toughening agent containing a compound having one element in its structure as a main component is used.
- the compound is hydrophobic even if impregnated. Because of its solubility, the water-soluble organic binder does not dissolve or swell, and does not cause partition deformation such as cell distortion. Therefore, it can be particularly preferably applied to a production method including a step of preparing a base material by incorporating a water-soluble organic binder into the clay, without causing a problem such as deformation.
- a ceramic honeycomb structure can be manufactured.
- a reinforcing agent mainly containing a compound having an element contributing to the above-mentioned strength improvement in the structure is used as the reinforcing agent, such an element is considered as a base in its physicochemical properties. It will be arranged uniformly over the whole material. For this reason, a ceramic honeycomb structure having uniformly improved strength can be manufactured without taking measures such as dispersion, and the occurrence of local erosion can be substantially avoided. Further, by using such a reinforcing agent, a ceramic honeycomb structure excellent in erosion resistance without variation in erosion resistance among products can be stably obtained by a simple process.
- One embodiment of the fourth invention is a method for manufacturing a ceramic honeycomb structure, wherein a base material that is a dried body before firing having a honeycomb structure is obtained by using a kneaded material containing a ceramic material as a main component.
- the fired body is fired to obtain a fired body, and the fired body mainly includes a compound having at least one element selected from the group consisting of Si, Ti, Mg, and A1 in its structure. After adhering and impregnating a reinforcing agent as a component, re-firing is performed.
- the reinforcing agent is applied and impregnated to the fired body that has been fired in advance, and re-firing is performed. It is possible to manufacture a ceramic honeycomb structure with improved strength, in which the above-described problems such as deformation hardly occur. Further, there is no variation in erosion resistance between products, and a ceramic honeycomb structure excellent in erosion resistance can be stably obtained by a simple process. Hereinafter, each step will be described specifically.
- a base material which is a dried body having a honeycomb structure, using a kneaded material mainly composed of a ceramic material, specifically, a honeycomb formed by partition walls
- a substrate which is a dried body having a honeycomb structure and has a plurality of cells serving as flow paths for fluids partitioned into shapes, is formed.
- the ceramic material there is no particular limitation on the ceramic material, and examples thereof include silicon carbide, boron carbide, titanium carbide, zirconium carbide, silicon nitride, boron nitride, aluminum nitride, alumina, zirconia, mullite, cordierite raw material, and aluminum titanate. At least one selected from the group consisting of dium and sialon can be used. Note that the relationship between the ceramic material and the type of the reinforcing agent will be described later.
- other additives may be included in the clay as needed. Specifically, a water-soluble organic binder, a crystal growth aid, a dispersant, a forming agent, or the like can be contained.
- water-soluble organic binder examples include hydroxypropylmethylcellulose, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, polyvinyl alcohol, and polyvinyl acetal.
- crystal growth aid examples include magnesia, silica, yttria, and iron oxide.
- dispersant examples include ethylene glycol, dextrin, fatty acid stone, and polyalcohol. be able to.
- pore-forming agent include graphite, wheat flour, starch, phenolic resin, and polyethylene terephthalate. These additives can be used alone or in combination of two or more depending on the purpose.
- the kneaded material may be prepared by a usual method. For example, an appropriate amount of water or the like is mixed with a raw material obtained by adding an additive such as a water-soluble organic binder to a ceramic material, and other additives are added as necessary. , And kneaded with a kneader, pressurized eider, vacuum kneader, or the like.
- extrusion molding is preferable in terms of excellent mass productivity. It is preferable to perform extrusion molding using an extrusion molding device such as an extrusion molding device or a twin screw continuous extrusion molding device.
- a ceramic honeycomb structure having excellent physical strength can be formed even with a thin wall having a thickness of 0.05 mm or less. it can.
- a predetermined reinforcing agent shown below is adhered and impregnated at the stage of the base material (unfired body), which is a dried body before firing, or at the stage of the fired body after firing. You.
- the same Reinforcing agents can be used. Therefore, the case where the reinforcing agent is adhered and impregnated on the base material which is the dried body before firing will be described below. .
- the main component is a compound having an element in its structure that contributes to improving the strength of the obtained ceramic 82-cam structure.
- examples of such an element include at least one element selected from the group consisting of Si, Ti, Mg, and A1.
- the compound which is a main component of such a reinforcing agent generates an inorganic oxide by combustion.
- the compound having Si in the structure is preferably an organic compound having a siloxane bond, for example, a silicone oil, a silicone varnish, a silicone alkoxy oligomer, or a mixture thereof. Mixtures and the like are preferred.
- silica S i 0 2
- silica S I_ ⁇ 2 itself is not a liquid, a dispersion medium when there use this It needs to be dispersed.
- silicone oils examples include dimethyl silicone oil, methyl phenyl silicone oil, methyl octyl silicone oil, amino-modified silicone oil, epoxy-modified silicone oil, carboxyl-modified silicone oil, carbinol-modified silicone oil, Methacryl-modified silicone oil, mercapto-modified silicone oil, phenol-modified silicone oil, one-end reactive silicone oil, heterofunctional group-modified silicone oil, polyester-modified silicone oil, methylstyryl-modified silicone oil, alkyl-modified silicone oil, Or higher fatty acid ester-modified silicone oil.
- the compounds having Ti, Z or A1 in the structure include, for example, aluminate alkoxy oligomers such as acetoalkoxyaluminum diisopropylate, or cups Preference is given to titanate alkoxy oligomers used as ring agents.
- aluminate alkoxy oligomers such as acetoalkoxyaluminum diisopropylate, or cups Preference is given to titanate alkoxy oligomers used as ring agents.
- magnesia MgO
- magnesia (Mg ⁇ ) itself is not liquid, When using this, it is necessary to disperse it in a dispersion medium.
- the above-mentioned various compounds may be used alone or in combination of two or more to prepare a toughening agent. It is preferred to prepare an agent.
- an agent When preparing a reinforcing agent by mixing two or more kinds, compounds having various viscosities can be selected and mixed, so that the viscosity of the reinforcing agent can be arbitrarily adjusted, and the obtained reinforcing agent can be used. Uniform adhesion and impregnation on the substrate becomes easy. Also, by arbitrarily selecting and mixing the compounds, it is possible to control the degree of reinforcement while securing the desired heat shock resistance, and to impart the desired erosion resistance according to the partition wall thickness and the like. Can be.
- the mixing ratio (S AO or MHSO / DMSO) of silicate alkoxy oligomer (SAO) or methyl hydrogen silicone oil (MHSO) and dimethyl silicone oil (DMSO) is 10 / It is preferably 90 to 75Z25 (mass ratio), more preferably 15/85 to 50/50 (mass ratio), even more preferably 20/80 to 50Z50 (mass ratio), It is particularly preferred that the ratio be 75 to 50/50 (mass ratio).
- the mixing ratio is within this range, it is possible to obtain a honeycomb structure having excellent erosion resistance while securing desired thermal shock resistance.
- the fortifying agent used in the third and fourth embodiments of the present invention may be a compound such as the aforementioned silicone oil or the like, an aromatic hydrocarbon such as toluene or xylene, an aliphatic hydrocarbon such as petroleum ether or kerosene, It is diluted with a diluent containing one or more of petroleum hydrocarbons such as kerosene or light oil, alcohols such as isopropyl alcohol, lauryl alcohol, or butanol, and volatile silicone oils. Is also good.
- a diluent By using such a diluent, the degree of strengthening can be arbitrarily controlled, and the viscosity of the reinforcing agent can be arbitrarily determined. Therefore, it is easy to uniformly adhere and impregnate the obtained reinforcing agent to the base material.
- the toughening agent used in the third and fourth embodiments of the present invention preferably has an absolute viscosity of 1 to 100 OmPas, and 10 to: LOOOmPas. More preferred.
- low-viscosity compounds tend to have a low degree of polymerization and tend to volatilize. If the viscosity is less than ImPa 's, COz will be generated when sintering and impregnating the partition walls and firing.
- the effective components such as Si present in the reinforcing agent also volatilize, making it difficult to impart strength.
- the viscosity exceeds 1000 OmPa-s, it becomes difficult to attach and impregnate the reinforcing agent to the base material with a uniform thickness.
- an appropriate compound as a main component of the reinforcing agent used in the third and fourth embodiments of the present invention for each type of ceramic raw material is preferable to select an appropriate compound as a main component of the reinforcing agent used in the third and fourth embodiments of the present invention for each type of ceramic raw material.
- a compound having Si in the structure specifically, a reinforcing agent mainly containing silicone oil or the like, for a clay having a cordierite-forming raw material as a main component.
- the reinforcing agent prepared in a liquid or slurry form may be impregnated.
- a sufficient amount of reinforcing agent must be used.
- compressed air may be blown from the outflow end side to gradually increase the amount of the adhered reinforcing agent toward the inflow end side.
- Compressed air or the like may be blown from the end or outflow end to remove excess adhering agent with compressed air or the like. Specifically, gradually reduce the pressure of compressed air to be blown, reduce the amount of blown air, and shorten the blowing time from the center to the outer periphery of the cross section perpendicular to the cell flow direction. It can be manufactured by the following.
- a method of gradually attaching and impregnating the reinforcing agent whose concentration is gradually increased from the center of the cross section orthogonal to the flow direction of the cell to the outer peripheral portion is also perpendicular to the flow direction. It is possible to manufacture a ceramic honeycomb structure in which the porosity per unit volume (cm 3 ) gradually decreases from the center to the outer periphery of the cross section.
- the substrate impregnated with the reinforcing agent is fired.
- the base and the reinforcing agent are dried before firing.
- the drying method include blast drying, hot-air drying, and microwave drying.
- the firing conditions it is preferable to appropriately select desired conditions depending on the types of the base material and the reinforcing agent.
- the base material is mainly composed of a cordierite-forming material and the reinforcing agent is mainly composed of a compound having Si in its structure, such as silicone oil, 13 What is necessary is just to bake at 00-150 degreeC.
- the firing conditions for attaching and impregnating the reinforcing agent at the stage of the fired body after firing may be in accordance with a conventional method, and desired conditions may be appropriately selected depending on the type of the base material.
- the base material is mainly composed of a cordierite-forming material, it may be fired at 130 to 150 ° C.
- the refiring conditions for refiring after the adhesion and impregnation of the reinforcing material to the fired body may be in accordance with the firing conditions for the case where the reinforcing material is adhered to the substrate and impregnated as described above. .
- it is preferable to dry the reinforcing agent before re-firing and it is preferable to appropriately select desired firing conditions depending on the type of the base material and the reinforcing agent.
- the ceramic honeycomb structure having high resistance to erosion at the inflow end and high compression strength (isostatic strength) during canning can be obtained.
- the product can be easily manufactured without variation in characteristics between products.
- the porosity per unit volume (cm 3 ) of the ceramic honeycomb structure manufactured as described above changes from the inflow end side to the outflow end side. Or the porosity per unit volume (cm 3 ) gradually decreases from the center of the cross section perpendicular to the cell flow direction to the outer periphery.
- the obtained substrate was entirely impregnated with the reinforcing agent shown in Table 1, whereby the entire substrate was adhered to and impregnated with the reinforcing agent. Then, compressed air is blown from the outflow end side to gradually increase the amount of the strengthening agent adhering toward the inflow end side, and after removing the excessively adhering reinforcing agent, 140 ° (:, 4 hours) This was fired to produce a ceramic honeycomb structure (Examples 1 to 10).
- silica (S i 0 2) per 1 0 0 parts by weight of the dispersion obtained powder is 5 wt% dispersed, 0.5 parts by weight of the dispersing agent (polyoxyalkylene Base polymer / manufactured by NOF CORPORATION, Mariarim AKM—A ceramic mixture was prepared in the same manner as in Examples 1 to 10 except that a reinforcing agent prepared by adding A honeycomb structure was manufactured (Example 11),
- the ceramic honeycomb structure was manufactured in the same manner as in Examples 1 to 10 described above except that the reinforcing agent was gradually increased in the direction of (1) to (3), except that the excessive adhering agent was removed (Example 13).
- a cylindrical ceramic honeycomb structure was manufactured in the same manner as in Examples 1 to 10 except that the reinforcing agent was not completely impregnated (no treatment with the reinforcing agent) (Comparative Example 1).
- the base material (green body) is impregnated with the reinforcing agent to a depth of 5 mm from the opening end face, and the inflow end portion
- a columnar ceramic honeycomb structure was manufactured in the same manner as in Example 11 except that the reinforcing agent was attached to and impregnated into the partition present in the vicinity (Comparative Example 2).
- a ceramic honeycomb structure was manufactured in the same manner as in Comparative Example 1 described above (Comparative Example 3).
- Examples 1 to 13 and Comparative Examples 1 to 4 With respect to each of the manufactured ceramic honeycomb structures (Examples 1 to 13 and Comparative Examples 1 to 4), respective physical property values were measured according to the methods described below, and each characteristic was evaluated. Tables 1 and 2 show the results. Table 3 shows the porosity (%) at each sampling site (mm) for the ceramic honeycomb structures of Example 3 and Comparative Examples 1 and 2. Fig. 3 shows the porosity (%) plotted against each sample site (mm).
- FIG. 1 is a schematic view from the side, illustrating the sample collection sites (A to E) of the ceramic honeycomb structure.
- Fig. 2 is a cell illustrating the sample collection sites (F to J).
- FIG. 3 is a schematic view of a cross section orthogonal to the flow path direction. As shown in Figs. 1 and 2, each of the sampling sites A to J of the ceramic honeycomb structure 1 as the measurement sample is cut out to a predetermined length (A to E: thickness 5 mm, F to J: width 10 mm).
- Pore distribution was calculated from pressure and absorbed mercury volume.
- the pore volume was calculated from the volume of mercury absorbed by applying a pressure of 68.6 MPa (700 kgf / cm 2 ).
- the porosity was determined by the following equation from the total pore volume.
- Porosity (%) Total pore volume (per g) X 100Z (Total pore volume (per g) JP03 / 04622
- the ceramic honeycomb structure was connected in series to a 4-cylinder, 1.8-liter gasoline engine exhaust port with a metal can held and housed in the ceramic honeycomb structure. That is, the sample was placed immediately adjacent to the engine.
- the engine was operated under the conditions shown in Fig. 7, and when the rotational speed reached 600 rpm, the abrasive grains (silicon carbide, GC320, average particle size 50 m) were changed to 0.1. g. Further, the operation of the engine was continued under the conditions shown in FIG. 7, and the abrasive grains were injected once in two cycles with one cycle of 130 seconds, and this was continuously repeated.
- the test was performed several times with the total amount of abrasive grains varied from about 2 g to about 16 g, and the results showed that the erosion amount (wind erosion volume) of the ceramic honeycomb structure when the abrasive amount was 10 g. Was calculated.
- the erosion amount was determined by wrapping a rubber sheet around the processed end face of the ceramic honeycomb structure 1 on the side where the erosion amount was measured, with ceramic beads 20 having a diameter of 1.5 mm being enclosed by about 3 mm. After laying at the same height and collecting, the bead volume was measured, the difference between the bead volume after the erosion test and the bead volume before the test was determined, and the average of three times was taken as the erosion amount. .
- the evaluation was performed on three ceramic honeycomb structures obtained in each of Examples and Comparative Examples, and when all the erosion generation amounts exceeded 3 cc, it was regarded as unsuitable for practical use. The case of cc was evaluated as ⁇ , and the case of all less than 2 cc was evaluated as ⁇ .
- the ceramic honeycomb structure After heating the ceramic honeycomb structure to a predetermined temperature using an electric furnace, the ceramic honeycomb structure is taken out into a room temperature atmosphere of 20 ° C, and both the high-temperature state immediately after being taken out and the state after cooling with cold air (20 ° C) At that time, it was visually observed whether defects such as cracks due to thermal shock occurred. If no defect is observed by observation, raise the heating temperature further and repeat the test until the temperature at which the defect occurs. The temperature limit was determined, and the thermal shock resistance was evaluated.
- Dimethylsilicone oil (Shin-Etsu Chemical Co., Ltd., trade name: KF96—100 CS, absolute viscosity: about 100 mPa ⁇ Dimethylsilicone oil (Shin-Etsu Chemical Co., Ltd., trade name: KF9 6 L— 0.65 CS, absolute viscosity: 0.65 mP methylhydrogen silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF99, absolute viscosity: 20 mPa ⁇ s) Silicate alkoxy Oligomer (manufactured by Shin-Etsu Chemical Co., Ltd., product name: KR-500, absolute viscosity: 20 mPa-s) Petroleum hydrocarbon (manufactured by Nisseki Mitsubishi, product name: kerosene Chrysefoil F8 mixed oil (Main component: Kerosene)
- the ceramic honeycomb structures of Examples 1 to 12 have improved erosion resistance and isostatic strength as compared with the ceramic honeycomb structure of Comparative Example 1. It was found that the isostatic strength and the thermal shock resistance were improved as compared with the ceramic honeycomb structure of Comparative Example 2.
- the ceramic honeycomb structures of Examples 1 to 12 are more excellent in erosion resistance than the ceramic honeycomb structure of Comparative Example 1 because the porosity of the inflow end (A) is lower than that of the outflow end (E ), And the porosity at the inflow end (A) is 25% or less in Examples 1 to 12, whereas Comparative Example 1 has 27.5%. The reason is that the porosity is high and the porosity of the portion where the exhaust gas hits is low.
- the ceramic honeycomb structures of Examples 1 to 12 are superior in isostatic strength to the ceramic honeycomb structures of Comparative Examples 1 and 2 because of the low porosity although the entire honeycomb structure is slight. Specifically, the average of the porosity of the entire ceramic honeycomb structure of Examples 1 to 12 is less than 26%, whereas the ceramics of Comparative Examples 1 and 2 The average porosity of the entire honeycomb structure is 26% or more, and it is considered that this is also due to the large occupancy of the portion having a porosity of 26% or more.
- the reason why the ceramic honeycomb structures of Examples 1 to 12 are superior in the thermal shock resistance as compared with the ceramic honeycomb structure of Comparative Example 2 is that, for example, the sample collection site of the ceramic honeycomb structure of Comparative Example 2 In (A) and (B), the porosity gradually increased per unit volume (cm 3 ) was 0.28% / mm, whereas the ceramic honeycomb structure of Example 11 was sampled. Porosity porosity per unit volume (cm 3 ) between parts (A) and (B) In this case, the porosity does not significantly change in the honeycomb structure, as is evident from the gradual change of 0.08% Zmm. It is considered that there is no change. In addition, as is evident from the results shown in Table 3 and Fig. 3, the porosity gradually increases from the inflow end (A) to the outflow end (E). This is considered to be because the generated thermal stress and the residual stress at the time of manufacturing became smaller.
- the ceramic honeycomb structure of Example 13 has improved erosion resistance and isostatic strength as compared with the ceramic honeycomb structure of Comparative Example 3. It has been found.
- the ceramic honeycomb structure of Example 13 is more excellent in erosion resistance than the ceramic honeycomb structure of Comparative Example 3 because the ceramic honeycomb structure of Example 13 is the same as the ceramic honeycomb structure of Examples 1 to 12.
- the porosity of the inflow end portion is lower than that of the ceramic honeycomb structure of Comparative Example 3 because the reinforcing agent is once completely contained and manufactured. it is conceivable that.
- the ceramic honeycomb structure of Example 13 was superior to the ceramic honeycomb structure of Comparative Example 3 in the isostatic strength because the porosity of the outer peripheral portion (J) was lower than that of the central portion (F). It is considered that this is because the porosity is lower than that of (). Further, the ceramic honeycomb structure of Example 13 did not decrease in thermal shock resistance as compared with the ceramic honeycomb structure of Comparative Example 3. This is considered to be because the generated thermal stress and residual stress during manufacturing did not increase because the porosity gradually decreased from the center (F) to the outer periphery (J). . '
- Comparative Example 4 when Comparative Example 4 was compared with Example 13, Comparative Example 4 exhibited a force showing erosion resistance and isostatic strength equal to or greater than that of Example 13 and a thermal shock resistance. It turned out to be very poor. This is presumably because the porosity per unit volume (cm 3 ) in the direction from the center (F) to the outer periphery (J) gradually decreased in comparison with Example 13. Industrial applicability
- the ceramic honeycomb structure of the present invention has a unit volume (c PC hire 622
- a base material dried body before firing
- a fired body having an 82-cam structure obtained by using a predetermined clay is provided with a predetermined reinforcing agent.
- baking or re-baking is performed, so that problems such as deformation of the partition walls and the like hardly occur, and a production method with less variation in physical properties between individuals is provided.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Ceramic Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03717565A EP1498179A4 (en) | 2002-04-25 | 2003-04-11 | CORE STRUCTURAL BODY OF BEES AND METHOD FOR PRODUCING THE STRUCTURAL BODY |
US10/510,047 US7344770B2 (en) | 2002-04-25 | 2003-04-11 | Ceramics honeycomb structural body and method of manufacturing the structural body |
AU2003227488A AU2003227488A1 (en) | 2002-04-25 | 2003-04-11 | Ceramics honeycomb structural body and method of manufacturing the structural body |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002123463 | 2002-04-25 | ||
JP2002-123463 | 2002-04-25 | ||
JP2003-56524 | 2003-03-04 | ||
JP2003056524A JP4545383B2 (ja) | 2002-04-25 | 2003-03-04 | セラミックスハニカム構造体及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003090929A1 true WO2003090929A1 (fr) | 2003-11-06 |
Family
ID=29272344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/004622 WO2003090929A1 (fr) | 2002-04-25 | 2003-04-11 | Corps structurel ceramique en nids d'abeille et procede pour produire le corps structurel |
Country Status (5)
Country | Link |
---|---|
US (1) | US7344770B2 (ja) |
EP (1) | EP1498179A4 (ja) |
JP (1) | JP4545383B2 (ja) |
AU (1) | AU2003227488A1 (ja) |
WO (1) | WO2003090929A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1547743A4 (en) * | 2002-08-21 | 2006-05-17 | Ngk Insulators Ltd | METHOD FOR PRODUCING A WAVE STRUCTURE |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4874123B2 (ja) * | 2003-12-31 | 2012-02-15 | コーニング インコーポレイテッド | 疎水性コーティングを有するセラミック構造体 |
US7553349B2 (en) | 2005-08-26 | 2009-06-30 | Corning Incorporated | Composite coatings for thin-walled ceramic honeycomb structures |
US8609581B2 (en) * | 2005-08-31 | 2013-12-17 | Ngk Insulators, Ltd. | Honeycomb structure and honeycomb catalytic body |
JP5037809B2 (ja) * | 2005-10-25 | 2012-10-03 | 日本碍子株式会社 | ハニカム構造体 |
JP5073303B2 (ja) * | 2006-03-24 | 2012-11-14 | 日本碍子株式会社 | 触媒コンバータ及び触媒コンバータの製造方法 |
JP5090673B2 (ja) | 2006-06-13 | 2012-12-05 | トヨタ自動車株式会社 | 触媒用ハニカム担体とそれを用いた排ガス浄化用触媒 |
JP4963380B2 (ja) * | 2006-07-26 | 2012-06-27 | トヨタ自動車株式会社 | 排ガス浄化用触媒及びその製造方法 |
EP2133132B1 (en) * | 2007-03-30 | 2015-10-14 | NGK Insulators, Ltd. | Honeycomb segment and honeycomb structure |
WO2009141890A1 (ja) * | 2008-05-20 | 2009-11-26 | イビデン株式会社 | ハニカム構造体および排ガス浄化装置 |
JP5647051B2 (ja) * | 2011-03-25 | 2014-12-24 | 日本碍子株式会社 | セラミックス乾燥体、セラミックス構造体及びセラミックス構造体の製造方法 |
JP5658067B2 (ja) * | 2011-03-25 | 2015-01-21 | 日本碍子株式会社 | セラミックス成形体、セラミックス構造体及びセラミックス構造体の製造方法 |
US9011583B2 (en) | 2011-04-29 | 2015-04-21 | Corning Incorporated | Article for CO2 capture having heat exchange capability |
US9062586B2 (en) * | 2012-04-05 | 2015-06-23 | Corning Incorporated | Impermeable polymer coating on selected honeycomb channel surfaces |
JP6396240B2 (ja) * | 2015-03-17 | 2018-09-26 | 日本碍子株式会社 | ハニカム構造体のエロージョン評価方法 |
JP6881337B2 (ja) * | 2018-01-30 | 2021-06-02 | 株式会社デンソー | ハニカム構造体および金型 |
JP7062493B2 (ja) * | 2018-03-30 | 2022-05-06 | 日本碍子株式会社 | 触媒担持用ハニカム構造体及びその製造方法 |
CN110477456A (zh) * | 2019-08-02 | 2019-11-22 | 深圳麦克韦尔科技有限公司 | 多孔结构组件和电子烟 |
JP2022142543A (ja) * | 2021-03-16 | 2022-09-30 | 日本碍子株式会社 | ハニカム構造体及び電気加熱式担体 |
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JP2001031465A (ja) * | 1998-03-31 | 2001-02-06 | Ngk Insulators Ltd | 高強度薄壁ハニカム構造体 |
US6242072B1 (en) * | 1998-06-03 | 2001-06-05 | Denso Corporation | Honeycomb structural body and process for production of the same |
US20010003728A1 (en) * | 1999-12-07 | 2001-06-14 | Keiji Ito | Ceramic honeycomb structural body and methods of preparing the same |
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US4255316A (en) * | 1979-04-26 | 1981-03-10 | Dow Corning Corporation | Ceramifiable silicone adhesives |
JPH0657624B2 (ja) * | 1987-11-30 | 1994-08-03 | イビデン株式会社 | 炭化ケイ素質ハニカム構造体及びその製造方法 |
JPH0657623B2 (ja) * | 1987-11-30 | 1994-08-03 | イビデン株式会社 | 炭化ケイ素質ハニカム構造体及びその製造方法 |
JP2001226173A (ja) | 1999-12-07 | 2001-08-21 | Denso Corp | ハニカム構造体の製造方法 |
-
2003
- 2003-03-04 JP JP2003056524A patent/JP4545383B2/ja not_active Expired - Fee Related
- 2003-04-11 US US10/510,047 patent/US7344770B2/en not_active Expired - Lifetime
- 2003-04-11 EP EP03717565A patent/EP1498179A4/en not_active Withdrawn
- 2003-04-11 AU AU2003227488A patent/AU2003227488A1/en not_active Abandoned
- 2003-04-11 WO PCT/JP2003/004622 patent/WO2003090929A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001031465A (ja) * | 1998-03-31 | 2001-02-06 | Ngk Insulators Ltd | 高強度薄壁ハニカム構造体 |
US6242072B1 (en) * | 1998-06-03 | 2001-06-05 | Denso Corporation | Honeycomb structural body and process for production of the same |
US20010003728A1 (en) * | 1999-12-07 | 2001-06-14 | Keiji Ito | Ceramic honeycomb structural body and methods of preparing the same |
Non-Patent Citations (1)
Title |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1547743A4 (en) * | 2002-08-21 | 2006-05-17 | Ngk Insulators Ltd | METHOD FOR PRODUCING A WAVE STRUCTURE |
US7501158B2 (en) | 2002-08-21 | 2009-03-10 | Ngk Insulators, Ltd. | Method for manufacturing honeycomb structure |
Also Published As
Publication number | Publication date |
---|---|
AU2003227488A1 (en) | 2003-11-10 |
JP2004000907A (ja) | 2004-01-08 |
EP1498179A1 (en) | 2005-01-19 |
EP1498179A4 (en) | 2007-08-29 |
US20050181172A1 (en) | 2005-08-18 |
JP4545383B2 (ja) | 2010-09-15 |
US7344770B2 (en) | 2008-03-18 |
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