WO2011135974A1 - ルチル型酸化チタン結晶を含有する赤外線吸収薄膜及びその製造方法 - Google Patents
ルチル型酸化チタン結晶を含有する赤外線吸収薄膜及びその製造方法 Download PDFInfo
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- WO2011135974A1 WO2011135974A1 PCT/JP2011/058304 JP2011058304W WO2011135974A1 WO 2011135974 A1 WO2011135974 A1 WO 2011135974A1 JP 2011058304 W JP2011058304 W JP 2011058304W WO 2011135974 A1 WO2011135974 A1 WO 2011135974A1
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- WIPO (PCT)
- Prior art keywords
- infrared
- titanium oxide
- thin film
- transition metal
- rutile
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 162
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 239000013078 crystal Substances 0.000 title claims abstract description 94
- 239000010409 thin film Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008569 process Effects 0.000 title claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 229920000642 polymer Polymers 0.000 claims abstract description 45
- 229910001428 transition metal ion Inorganic materials 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 30
- 125000003277 amino group Chemical group 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 150000003609 titanium compounds Chemical class 0.000 claims abstract description 20
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 150000004703 alkoxides Chemical class 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 12
- 239000012736 aqueous medium Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000032683 aging Effects 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 32
- 238000000576 coating method Methods 0.000 claims description 32
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- 229910044991 metal oxide Inorganic materials 0.000 claims description 15
- 150000004706 metal oxides Chemical class 0.000 claims description 15
- 235000010215 titanium dioxide Nutrition 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
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- 239000010703 silicon Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
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- 238000010298 pulverizing process Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 150000001413 amino acids Chemical class 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
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- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 239000010937 tungsten Substances 0.000 claims 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 19
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- 150000004696 coordination complex Chemical class 0.000 description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
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- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
- -1 alkoxy compound Chemical class 0.000 description 5
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- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 5
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 4
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- 239000004570 mortar (masonry) Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
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- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 3
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229910001429 cobalt ion Inorganic materials 0.000 description 3
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229940001447 lactate Drugs 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- AIFLGMNWQFPTAJ-UHFFFAOYSA-J 2-hydroxypropanoate;titanium(4+) Chemical compound [Ti+4].CC(O)C([O-])=O.CC(O)C([O-])=O.CC(O)C([O-])=O.CC(O)C([O-])=O AIFLGMNWQFPTAJ-UHFFFAOYSA-J 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- 229910003077 Ti−O Inorganic materials 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
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- ATHGHQPFGPMSJY-UHFFFAOYSA-N spermidine Chemical compound NCCCCNCCCN ATHGHQPFGPMSJY-UHFFFAOYSA-N 0.000 description 2
- PFNFFQXMRSDOHW-UHFFFAOYSA-N spermine Chemical compound NCCCNCCCCNCCCN PFNFFQXMRSDOHW-UHFFFAOYSA-N 0.000 description 2
- UODZHRGDSPLRMD-UHFFFAOYSA-N sym-homospermidine Chemical compound NCCCCNCCCCN UODZHRGDSPLRMD-UHFFFAOYSA-N 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- ZUQBZFLSLIOHGQ-UHFFFAOYSA-M 3-oxohexanoate propan-2-olate titanium(3+) Chemical compound CC([O-])C.CC([O-])C.C(C)CC(CC(=O)[O-])=O.[Ti+3] ZUQBZFLSLIOHGQ-UHFFFAOYSA-M 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000004251 Ammonium lactate Substances 0.000 description 1
- 239000004475 Arginine Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
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- 241000627951 Osteobrama cotio Species 0.000 description 1
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- 108010039918 Polylysine Proteins 0.000 description 1
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- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 229910011213 Ti—Mn2 Inorganic materials 0.000 description 1
- GSCOPSVHEGTJRH-UHFFFAOYSA-J [Ti+4].CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O Chemical compound [Ti+4].CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O.CCCC(=O)CC([O-])=O GSCOPSVHEGTJRH-UHFFFAOYSA-J 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- BZRLYGTWEDFWCR-UHFFFAOYSA-N amino 2-methylpent-2-enoate Chemical compound CCC=C(C)C(=O)ON BZRLYGTWEDFWCR-UHFFFAOYSA-N 0.000 description 1
- 125000000539 amino acid group Chemical group 0.000 description 1
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- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 description 1
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- RZOBLYBZQXQGFY-HSHFZTNMSA-N azanium;(2r)-2-hydroxypropanoate Chemical compound [NH4+].C[C@@H](O)C([O-])=O RZOBLYBZQXQGFY-HSHFZTNMSA-N 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- OTBHHUPVCYLGQO-UHFFFAOYSA-N bis(3-aminopropyl)amine Chemical compound NCCCNCCCN OTBHHUPVCYLGQO-UHFFFAOYSA-N 0.000 description 1
- BSDOQSMQCZQLDV-UHFFFAOYSA-N butan-1-olate;zirconium(4+) Chemical compound [Zr+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] BSDOQSMQCZQLDV-UHFFFAOYSA-N 0.000 description 1
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- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 150000002367 halogens Chemical class 0.000 description 1
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- 150000002466 imines Chemical class 0.000 description 1
- 238000004433 infrared transmission spectrum Methods 0.000 description 1
- IXZOTKANSDQAHZ-UHFFFAOYSA-N manganese(ii) titanate Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Mn+2] IXZOTKANSDQAHZ-UHFFFAOYSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- SYUYXOYNRMMOGW-UHFFFAOYSA-N n,n-dimethyl-3-phenylprop-2-en-1-amine Chemical compound CN(C)CC=CC1=CC=CC=C1 SYUYXOYNRMMOGW-UHFFFAOYSA-N 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
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- 239000011941 photocatalyst Substances 0.000 description 1
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- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- HKJYVRJHDIPMQB-UHFFFAOYSA-N propan-1-olate;titanium(4+) Chemical compound CCCO[Ti](OCCC)(OCCC)OCCC HKJYVRJHDIPMQB-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
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- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
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- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
- 238000009681 x-ray fluorescence measurement Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
- C01G51/02—Carbonyls
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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Definitions
- the present invention relates to a thin film containing a rutile type titanium oxide crystal capable of efficiently absorbing infrared rays and a method for producing the same.
- materials that absorb infrared rays in the entire infrared wavelength range can generate heat effectively, so as a material that converts infrared energy into thermal energy, Expectations are in the energy field.
- infrared absorption In order to cause heat generation by infrared absorption, it is desirable to absorb light in all infrared wavelengths, for example, near infrared, middle infrared, and far infrared wavelengths. In order to use heat generation as a heat source, it is desirable that the infrared absorbing material itself has heat resistance. In order to satisfy these, there can only be an infrared absorbing material made of an inorganic material. However, ordinary inorganic materials cannot absorb light at all infrared wavelengths. As a material that can absorb infrared rays, it is known to transmit infrared rays having a specific wavelength in a narrow wavelength range.
- titanium oxide Compared with precious metal oxides, titanium oxide has a large reserve in the natural world. From white pigments, general-purpose materials such as photocatalysts and paints, to special application fields such as dye-sensitized solar cells and photoresponsive materials. It is an inexpensive material widely used in industry. Titanium oxide itself absorbs some infrared light at certain wavelengths in the short-wavelength and ultra-wavelength infrared regions, but does not absorb infrared light in most wavelength ranges. However, if a certain twist is caused in the crystal lattice structure of titanium oxide, it is considered that the infrared rays are efficiently absorbed.
- the problem to be solved by the present invention is to provide an infrared absorbing thin film that efficiently absorbs infrared rays and is excellent in versatility by controlling the absorption intensity of titanium oxide in the infrared region, and a method for producing the same. There is to do.
- the present inventors have doped titanium oxide with a small amount of transition metal ions, grown the doped titanium oxide into a rutile crystal, and reduced the thickness thereof.
- the present inventors have found that the thin film can absorb wavelengths in the entire infrared range, and that the absorption causes heat generation, thereby completing the present invention.
- the present invention is a method for producing an infrared-absorbing thin film containing a rutile-type titanium oxide crystal doped with transition metal ions, (I) a step of dispersing or dissolving a complex (y) of a basic polymer (x) having an amino group and a transition metal ion in an aqueous medium, (II) The aqueous dispersion or aqueous solution obtained in (I) and the water-soluble titanium compound (z) are mixed in an aqueous medium under a temperature condition of 50 ° C. or less to carry out a hydrolysis reaction, whereby an amino acid is obtained.
- a polymer / titania layered structure composite having a distance of 1 to 3 nm in which a complex (y) of a basic polymer (x) having a group and a transition metal ion is sandwiched between titanias; (III) The layered structure composite is heated and fired at a temperature of 650 ° C. or higher in an air atmosphere so that transition metal ions confined in the layered structure are doped on the surface of the titanium oxide crystal and at the same time the rutile type crystal phase.
- the process of growing (IV) a step of pulverizing the crystals obtained above to form a powder; (V) a step of mixing the powder obtained above with a metal alkoxide sol solution to prepare a fluid liquid composition; (VI) a step of applying the fluid liquid composition obtained above to the surface of the substrate; (VII) aging the coating film,
- the present invention provides a method for producing an infrared-absorbing thin film containing a rutile-type titanium oxide crystal.
- the present invention provides an infrared absorption thin film containing a rutile type titanium oxide crystal characterized in that heat is generated by infrared absorption.
- the thin film containing a rutile-type titanium oxide crystal doped with a transition metal ion of the present invention can efficiently absorb infrared rays and convert the infrared energy into thermal energy. Therefore, the thin film obtained by this invention can be used industrially suitably as a photothermal conversion material which uses infrared rays.
- Example 2 is an XRD diffraction pattern of the precursor obtained in Example 1 and manganese titanium oxide after firing. From the bottom to the top, the unfired precursor, each sample after firing at 500 ° C., firing at 700 ° C., firing at 800 ° C., firing at 1100 ° C. 4 is an FT-IR spectrum obtained using doped titanium oxide after baking at 800 ° C. obtained in Example 1. Samples containing 95, 50, and 30 wt% of doped titanium oxide in the KBr plate in order from the bottom to the top. It is a coating-film surface temperature change accompanying irradiation time when the coating film produced in Example 1 was irradiated with infrared rays. (A) Sample after baking at 800 ° C.
- transition metal oxides have semiconducting properties, and the lattice constant of the crystal structure is almost determined. However, if the lattice constant is twisted, the electrical conductivity can be improved. Similarly, twisting of the crystal lattice constant causes structural changes (defects) between crystal planes, diversifying the vibration level bands in the crystal structure, and giving priority to wide-range vibrations derived from unspecified structures over vibrations derived from specific structures. To do. That is, a metal oxide having a twisted lattice constant absorbs infrared energy over a wide range of wavelengths, and intense vibrations within the crystal structure are accelerated. As a result, vibration energy can function as a heat source.
- a rutile type titanium oxide crystal as a metal oxide.
- a titanium oxide crystal an arrangement of an octahedral structure in which six oxygen atoms are coordinated around one titanium atom constitutes a crystal system.
- an octahedral structure is formed over other crystal systems. There is little sharing of the ridge line, and the two ridge lines are shared in a chain shape.
- the crystal grows by sharing four ridge lines.
- the ionicity of the Ti—O bond in the rutile-type titanium oxide crystal is larger than that of the anatase-type crystal, and when the rutile-type crystal is doped with another metal, the twist in the crystal structure and the nature of the Ti—O bond are affected. It is thought to have a big impact.
- metal ions are inserted into the nanostructure gap of titanium oxide, and in the structure state, formation and transformation of titanium oxide crystal phase are induced by heating, and in the process, metal ions are converted into titanium oxide. It is desirable to dope into the crystal structure.
- the present inventors have already provided metal doping to titanium oxide by utilizing a laminated structure of nanocrystals and nanospaces (for example, International Publication WO 2008/072595). That is, a nanolaminate structure in which a metal complex is sandwiched in a nanospace between titanium oxide and titanium oxide is produced, and metal ions confined in the space are doped into a titanium oxide crystal.
- the complex (y) of the basic polymer (x) having an amino group and the transition metal ion functions as a catalyst for the hydrolytic condensation reaction of the water-soluble titanium compound (z) and at the same time, the titania sol generated from the reaction.
- a polymer metal complex / titania layered structure composite in which the polymer and the titania are alternately laminated is generated.
- the transition metal ions therein cause a doping reaction on the titania crystal surface, which is converted into a doped titanium oxide that absorbs in the infrared wavelength range by forming a rutile type titanium oxide crystal.
- the crystal is a rutile type titanium oxide crystal.
- the firing temperature it is essential to set the firing temperature to 650 ° C. or higher, from the viewpoint of energy cost. It is desirable to set the temperature to ⁇ 1200 ° C. A firing temperature of 750 to 950 ° C. is preferable from the viewpoint of efficiently forming a rutile crystal phase.
- the firing time can be appropriately set in the range of 2 to 14 hours, but it is generally preferable to adjust the temperature range and time appropriately by combining a temperature increase program from the viewpoint of energy cost and productivity.
- the content of transition metal ions in the obtained rutile-type titanium oxide crystal is preferably in the range of 0.1 to 20% by mass, and the content is determined in the production stage of the composite as a precursor. It can be adjusted by the content of the transition metal ion in the complex (y) of the basic polymer (x) having an amino group and the transition metal ion. That is, the transition metal ions to be doped increase if the content is increased, and can be decreased if the content is decreased. Furthermore, by using a polymer complex having different transition metal ions in combination, it is possible to dope a plurality of types of transition metal ions into the resulting titanium oxide.
- the lattice structure constant of the rutile type titanium oxide crystal is different from that of the pure rutile type titanium oxide crystal by doping the transition metal ions in this way. That is, as described above, the lattice constant is reduced or increased, which means that twist is generated.
- the rutile-type titanium oxide crystals obtained above are usually in the form of a powder, which is directly or previously pulverized and then dispersed in a sol solution of a metal alkoxy compound to obtain a fluid liquid composition.
- a thin film can be produced by applying on a material.
- the particle size of the powder is usually several ⁇ m, but it can be easily prepared to a particle size of 100 nm or less by a pulverization / dispersion method such as meal, desper, or mortar. It is more preferable to use a powder having a particle size reduced to 100 nm or less for the infrared absorbing thin film because the density of the coating film can be improved and the heat generation effect by infrared absorption can be improved.
- the mass ratio of (the powder comprising) / (metal oxide formed by the metal alkoxide) is preferably in the range of 90/10 to 99/1, and the infrared ray of the thin film obtained using this fluid liquid composition In order to eliminate the transmission and to efficiently absorb infrared rays and to secure the adhesion to the base material, it is desirable to adjust in the range of 95/5 to 98/2.
- the metal alkoxide is not particularly limited as long as the decomposition reaction proceeds to room temperature or heating to form a metal oxide, and examples thereof include titanium, zirconium, and silicon alkoxides.
- Specific examples of the compound include tetrabutoxy titanium, tetrapropoxy titanium, tetraisobutoxy titanium, tetraisopropoxy titanium, titanium lactate, titanium bis (lactate), titanium (ethyl acetoacetate), tetrabutoxy zirconium, tetraethoxysilane. And so on.
- a sol solution can be prepared by dispersing the metal alkoxide in water, ethanol, isopropanol, butanol, ethylene glycol or the like. At this time, these solvents may be used alone or in admixture of two or more.
- a dispersion of metal oxide nanoparticles can be used as the metal oxide sol solution.
- titanium oxide nanoparticles having a particle size of 5 to 30 nm can be used as a dispersion of titanium oxide nanoparticles.
- a dispersion liquid of nanoparticles such as zirconium oxide, aluminum oxide, and zinc oxide can be used.
- the mass ratio of (powder made of rutile-type titanium oxide crystals) / (metal oxide as nanoparticles) is preferably in the range of 90/10 to 99/1.
- the range is 95/5 to 98/2. It is desirable to adjust to.
- the solid content concentration in the fluid liquid composition to be adjusted as described above is preferably 30 to 90% by mass from the viewpoint of easy application to a substrate and easy formation of a thin film after application.
- the method for applying the fluid liquid composition to the substrate is not particularly limited, and for example, a bar coater, spin coater, applicator, roll coater, deeping, spraying method, or the like can be used.
- the base material used at this time can be variously selected depending on the purpose of use of the infrared absorbing thin film of the present invention, such as metal, metal oxide, silicon, ceramics, glass, and plastic.
- the infrared absorbing thin film of the present invention can be obtained by aging (curing) the coating film by drying at room temperature or by heating. Heating is preferably performed to improve the adhesion to the substrate, but the temperature can be adjusted in accordance with the properties of the substrate used. For example, in the case of a base material having high heat resistance such as metal and metal oxide, it can be aged (cured) by heating up to 1200 ° C. on the other hand. When the base material is low in heat resistance such as plastic, it is preferable to perform heating at about 250 ° C. according to the material.
- the basic polymer (x) having an amino group used in the present invention is not particularly limited, and usual water-soluble polyamines and the like can be used.
- polymer (x) examples include, for example, synthetic amines such as polyvinylamine, polyallylamine, polyethyleneimine (branched and linear), polypropyleneimine, poly (4-vinylpyridine), poly (aminoethyl methacrylate). ) And poly [4- (N, N-dimethylaminomethylstyrene)] and the like, and synthetic polyamines containing amino groups in the side chain or main chain.
- synthetic amines such as polyvinylamine, polyallylamine, polyethyleneimine (branched and linear), polypropyleneimine, poly (4-vinylpyridine), poly (aminoethyl methacrylate).
- poly [4- (N, N-dimethylaminomethylstyrene)] and the like and synthetic polyamines containing amino groups in the side chain or main chain.
- polyethyleneimine is particularly preferable because it is easily available and can easily form a layered structure with a titanium oxide sol.
- biological polyamines include, for example, chitin, chitosan, spermidine, bis (3-aminopropyl) amine, homospermidine, spermine, etc., or biopolymers having many basic amino acid residues such as polylysine, polyhistidine, poly Biological polyamines including synthetic polypeptides such as arginine can be mentioned.
- the polymer (x) may be a modified polyamine in which a part of the amino group in the polyamine is bonded to a non-amine polymer skeleton, or a copolymer of a polyamine skeleton and a non-amine polymer skeleton. .
- the amino group of the basic polymer (x) having an amino group is reacted with a compound having a functional group that can easily react with an amine such as an epoxy group, a halogen, a tosyl group, or an ester group. Can be easily obtained.
- the non-amine polymer skeleton may be either hydrophilic or hydrophobic.
- hydrophilic polymer skeleton include skeletons composed of polyethylene glycol, polymethyloxazoline, polyethyloxazoline, polyacrylamide, and the like.
- hydrophobic polymer skeleton include a skeleton made of an epoxy resin, a urethane resin, a polymethacrylate resin, or the like.
- the non-amine polymer skeleton is preferably 50% by mass or less, and 20% by mass or less, relative to the total structural unit of the polymer (x). More preferably, it is more preferably 10% by mass or less.
- the molecular weight of the polymer (x) is not particularly limited, and the weight average molecular weight as a polystyrene conversion value determined by gel permeation chromatography (GPC) is usually in the range of 300 to 100,000. Yes, preferably in the range of 500 to 80,000, and more preferably in the range of 1,000 to 50,000.
- the transition metal ion used here is the same as the transition metal ion in the obtained rutile-type titanium oxide crystal, and all transition metal ions capable of coordinating with an amino group can be used.
- the transition metal ion valence may be a monovalent to tetravalent metal salt, and they can be preferably used even in a complex ion state.
- the rutile-type titanium oxide crystal obtained has high mid-infrared transmittance and is easy to obtain raw materials, so that it is an ion of iron, zinc, manganese, copper, cobalt, vanadium, tongue stem, nickel. preferable.
- the amount of the transition metal ion used is preferably 1/2 to 1/500 equivalent as an ion with respect to the number of moles of the amino group in the basic polymer (x) having an amino group.
- the titanium compound used in the present invention is preferably a non-halogenated titanium compound that is water-soluble and does not hydrolyze when dissolved in water, that is, is stable in pure water.
- aqueous solution of titanium bis (ammonium lactate) dihydroxide an aqueous solution of titanium bis (lactate), a propanol / water mixture of titanium bis (lactate), titanium (ethyl acetoacetate) diisopropoxide, etc. It is done.
- the polymer / titania layered structure composite can be obtained by mixing a water-soluble titanium compound (z) in an aqueous solution of a complex (y) of a basic polymer (x) having an amino group and a metal ion.
- the amount of the water-soluble titanium compound (z) as the titanium source is excessive with respect to the amine unit in the complex (y) of the basic polymer (x) having an amino group and the metal ion, the compound is suitably combined.
- the water-soluble titanium compound (z) is preferably in the range of 2 to 1000 times equivalent, particularly 4 to 700 times equivalent to the amine unit.
- the concentration of the aqueous solution of the complex (y) of the basic polymer (x) having an amino group and the transition metal ion is 0.1 to 30 on the basis of the amount of polyamine contained in the polymer (x). It is preferable to make it into the mass%.
- the time for the hydrolytic condensation reaction of the water-soluble titanium compound (z) varies from 1 minute to several hours, but it is more preferable to set the reaction time to 30 minutes to 5 hours in order to increase the reaction efficiency.
- the pH value of the aqueous solution in the hydrolytic condensation reaction is preferably set between 5 and 11, and particularly preferably 7 to 10.
- a complex obtained in the presence of a complex (y) of a basic polymer (x) having an amino group and a transition metal ion obtained by a hydrolytic condensation reaction becomes a colored precipitate reflecting the color of the transition metal ion.
- the content of titania in the composite (precursor) obtained by the hydrolytic condensation reaction can be adjusted depending on the reaction conditions and the like, and a product in the range of 20 to 90% by mass of the whole composite can be obtained.
- a rutile type titanium oxide crystal can be obtained by thermally firing the composite obtained here by the method described above.
- the rutile type titanium oxide crystal used in the present invention is a rutile type titanium oxide crystal doped with a transition metal ion.
- the shape is an amorphous powder, and the powder is a polycrystalline powder having a crystallite size of 20 to 100 nm.
- the doping amount of transition metal ions doped into titanium oxide is usually in the range of 0.05 to 20% by mass. In order to widen the infrared absorption wavelength range, the doping amount should be 0.1 to 20% by mass. Is desirable.
- the transition metal ion to be doped may be one type or two or more types.
- the half width of the transmission peak and the peak top can be appropriately adjusted depending on the mixed doping state.
- the crystal phase is preferably a rutile type crystal phase, but may be in a state where a certain amount of anatase crystal phase is mixed. At that time, the ratio of the anatase crystal phase is desirably 30% by mass or less.
- the rutile-type titanium oxide crystal powder used in the present invention can be lightly colored depending on the amount of transition metal ions doped and the type of transition metal ions.
- the particle size of the powder is usually several ⁇ m, but it can be easily prepared to a particle size of 100 nm or less by pulverization / dispersion methods such as meal, desper, and mortar.
- the infrared-absorbing thin film obtained by the present invention is also characterized by absorbing infrared rays and generating heat on the surface of the thin film.
- the surface temperature rises by 70 ° C. or more when irradiated with an infrared ray having a wavelength of 2 to 20 ⁇ m even for a weak Pauer infrared ray when irradiated with an infrared ray having a wavelength of 2 to 20 ⁇ m. If the light source is strong, the temperature rise can easily exceed 100 ° C.
- the infrared absorbing thin film of the present invention is produced on a plastic film and irradiated with infrared rays thereon, the plastic film can be deformed. Such a rapid exothermic phenomenon is not observed in a titanium oxide crystal not doped with metal ions.
- the infrared absorbing thin film of the present invention can be widely used industrially as various heat sources characterized by converting light energy into heat energy.
- Example 1 ⁇ Coating film containing 1-Ti-Mn50 doped with manganese ions>
- Synthesis of Manganese Ion Doped Titanium Oxide 1-Ti-Mn50 To 100 ml of 2 wt% polyethylimine (SP200, molecular weight 10,000, manufactured by Nippon Shokubai Co., Ltd.), 9 ml of 0.1 M Mn (NO 3) 2 was added, and a complex solution of polyethylimine / manganese ions (liquid A, imine / Mn The molar ratio of 50) was prepared.
- the precursor is a composite having a laminated structure formed from titanium oxide and a polymer metal complex.
- Each 2 g of the precursor was put in an alumina crucible and fired at different temperatures (500, 700, 800, 1100 ° C.) for 3 hours in an air atmosphere.
- temperatures 500, 700, 800, 1100 ° C.
- FIG. 1 it was confirmed from the XRD pattern of the obtained yellow powder that the diffraction peak at the low angle disappeared completely (FIG. 1).
- the baking at 500 ° C. only anatase was formed, and in the baking at 700 ° C., the presence of two crystal phases of anatase and rutile was confirmed. Furthermore, only a rutile type crystal phase was obtained by baking at a high temperature of 800 ° C. or 1100 ° C.
- the 1-Ti-Mn50 powder obtained above was mixed with KBr and ground in a mortar, and then the plates containing 30 wt%, 50 wt% and 95 wt% in KBr were prepared for FT-IR measurement. Using. FIG. 2 shows their FT-IR transmission spectra. Even in a plate containing 50 wt% 1-Ti—Mn50 powder in KBr, the near-infrared and far-infrared sides are absorbed, and IR is transmitted only in a certain wavenumber range of mid-infrared (wavelength: 6.8 to 13 ⁇ m). Characteristics were seen. The transmittance here was 24% or less.
- the 1-Ti—Mn50 powder obtained above was ground in a mortar and observed with an SEM. As a result, it was confirmed that the powder had an amorphous powder size of 70 to 90 nm, and 0.5 g was added. Weighed out and mixed with 2 mL of 10 vol% tetrabutoxytitanium solution in toluene. This mixed solution was applied to a silicon plate by a casting method. The coating film was allowed to stand at room temperature for 3 hours, and then allowed to stand at a high temperature of 1000 ° C. for 1 hour. Thereby, a 1 mm-thick coating film was produced.
- This coating film was irradiated with infrared rays by a ceramic type infrared irradiation apparatus (Cocarat, 200 W, manufactured by Tape Thermology Co., Ltd.).
- the indoor temperature was 10 ° C.
- the coating surface temperature rise due to the infrared irradiation time was measured using a non-contact type surface thermometer (manufactured by Anritsu Keiki Co., Ltd.).
- the results are shown in FIG. At 10 seconds after irradiation, the coating surface temperature rose nearly 60 ° C., and then the coating temperature rose to near 90 ° C. with irradiation time. Furthermore, when a drop of ethanol was dropped on the surface of the coating film whose surface temperature rose to 90 ° C., it was confirmed that the ethanol solution evaporated to a boil.
- Example 2 ⁇ Coating film containing 2-Ti-Mn200 doped with manganese ions> [Synthesis of Titanium Oxide 2-Ti-Mn200 Doped with Manganese Ions] Doping was performed under the same conditions except that the ethyleneimine / manganese ion molar ratio in Example 1 was changed to 1/200 to produce manganese-doped rutile-type titanium oxide crystals. A KBr plate containing 20 wt% of this crystal powder was prepared, and its FT-IR was measured. For comparison, a commercially available titanium oxide degusaP25 (anatase and rutile mixed crystal) and a KBr plate containing 20 wt% of a rutile type titanium oxide crystal were measured.
- the KBr plate containing 2-Ti—Mn200 did not transmit infrared rays in a range other than the intermediate wavelength region.
- Infrared absorption of comparative undoped rutile or commercially available titanium oxide (P25) was weak, indicating that transmission was predominant in the entire wavelength range.
- a coating film was prepared in the same manner as in Example 1, and when the temperature increase after irradiation with infrared rays for 100 seconds was measured, the coating film surface temperature reached 70 ° C.
- Example 3 Coating containing manganese ion-doped titanium oxide> Except for changing the molar ratio of ethyleneimine / manganese in Example 1 to 1/2, 1/5, and 1/10, precursor synthesis and firing in air (800 ° C.) were performed under the same conditions, manganese ions A rutile type titanium oxide crystal doped with is obtained. Table 1 shows three types of titanium oxides with different manganese doping amounts (manganese ion content is a conversion value when MnO is used).
- coating films were prepared in the same manner as in Example 1, and the temperature increase during infrared irradiation of these coating films was observed.
- the temperature rise at the time of irradiation for 150 seconds exceeded 70 ° C.
- Example 5 Coating film containing titanium oxide doped with nickel ions> [Synthesis of nickel ion doped titanium oxide]
- the precursor synthesis and firing in the air (800 ° C.) were carried out to obtain a rutile type titanium oxide crystal doped with nickel ions.
- Table 3 shows three types of titanium oxides having different nickel doping amounts (the nickel ion content is a conversion value when NiO is used). From the XRD measurement, it was confirmed that these three types of titanium oxides were crystals that coincided with the rutile crystal.
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Abstract
Description
(I)アミノ基を有する塩基性ポリマー(x)と遷移金属イオンとの錯体(y)を水性媒体中に分散又は溶解させる工程、
(II)(I)で得られた水性分散体又は水性溶液と、水溶性チタン化合物(z)とを水性媒体中、50℃以下の温度条件下で混合し加水分解反応を行うことによって、アミノ基を有する塩基性ポリマー(x)と遷移金属イオンとの錯体(y)がチタニアに挟まれた、1~3nmの距離間隔を有するポリマー/チタニアの層状構造複合体を得る工程、
(III)前記層状構造複合体を空気雰囲気下で650℃以上の温度で加熱焼成することにより、層状構造に閉じ込まれた遷移金属イオンが酸化チタン結晶表面にドーピングされると同時にルチル型結晶相に成長させる工程、
(IV)前記で得られた結晶を粉砕して粉体とする工程、
(V)前記で得られた粉体を金属アルコキシドのゾル液と混合し、流動性液状組成物を調製する工程、
(VI)前記で得られた流動性液状組成物を基材表面に塗布する工程、
(VII)前記塗布膜を熟成する工程、
を有することを特徴とするルチル型酸化チタン結晶を含有する赤外線吸収薄膜の製造方法を提供するものである。
〔ポリマー(x)〕
本発明において使用するアミノ基を有する塩基性ポリマー(x)は特に限定されるものではなく、通常の水溶性のポリアミン類等を用いることができる。
本発明の製造方法で用いる、アミノ基を有する塩基性ポリマー(x)と遷移金属イオンとの錯体(y)は、前述のアミノ基を有する塩基性ポリマー(x)に、遷移金属イオンを加えることで得られ、遷移金属イオンと前記ポリマー(x)中のアミノ基との配位結合によって錯体(y)を形成するものである。
本発明で用いるチタン化合物は水溶性であり、水中溶解された状態では加水分解しない、即ち、純水中で安定な非ハロゲン類チタン化合物であることが好ましい。具体的には、例えば、チタニウムビス(アンモニウムラクテート)ジヒドロキシド水溶液、チタニウムビス(ラクテート)の水溶液、チタニウムビス(ラクテート)のプロパノール/水混合液、チタニウム(エチルアセトアセテート)ジイソプロポオキシドなどが挙げられる。
ポリマー/チタニアの層状構造複合体は、アミノ基を有する塩基性ポリマー(x)と金属イオンとの錯体(y)の水溶液中、水溶性チタン化合物(z)を混合することで得ることができる。
酸化チタンを測定試料用ホルダーにのせ、それを株式会社リガク製広角X線回折装置「Rint-ultma」にセットし、Cu/Kα線、40kV/30mA、スキャンスピード1.0°/分、走査範囲20~40°の条件で行った。特に、被覆膜の内部構造詳細の分析では、その測定条件を以下のように設定した。X線:Cu/Kα線、50kV/300mA、走査スピード:0.12°/min;走査軸:2θ(入射角0.2~0.5°、1.0°)。
赤外線透過の測定は、パーキンエルマー社製のフーリェ変換赤外分光計Spectrum One Image System FT-IR Spectrometerを用いた。
蛍光X線測定は株式会社リガク製のZSXを用いて、真空条件下で行った。
[マンガンイオンドープされた酸化チタン1-Ti-Mn50の合成]
100mlの2wt%ポリエチルイミン(SP200、分子量10000、日本触媒株式会社製)に9mlの0.1MのMn(NO3)2を加えてポリエチルイミン/マンガンイオンの錯体溶液(A液、イミン/Mnのモル比50)を調製した。一方、乳酸チタン(松本製薬株式会社製、TC310、20vol%)溶液中に、28%アンモニア水を滴下し、pH=9の水溶液(B液)を調製した。B液100mlを取り出し、室温(25℃)下攪拌しながら、10mLのA液をゆっくり滴下した。1時間程度で、該混合液から多くの沈殿物が生成した。その沈殿物を濾過、水で洗浄後、室温で乾燥し、8.9gの淡黄色粉末(前駆体)を得た。この前駆体粉末のXRDパターンから、低角度(2θ約3.7°)側に層状構造を示唆する強いX線回折ピークが現れた(図1)。即ち、該前駆体は、酸化チタンとポリマー金属錯体から形成された積層構造を有する複合体である。
前記で得られた1-Ti-Mn50粉末を乳鉢にてすりつぶし、それをSEMにて観察したところ、不定形粉末として、そのサイズは70~90nm範囲であることを確認した後、0.5gを計り取り、2mLの10vol%テトラブトキシチタンのトルエン溶液と混合した。この混合液をシリコンプレートにキャスト法で塗布した。その塗布膜を室温にて3時間放置後、1000℃の高温で1時間放置した。これにより、1mm厚みの塗膜を作製した。この塗膜をセラミックス型赤外線照射装置(コカラット、200W、テ-ピ熱学株式会社製)にて、赤外線照射した。室内温度が10℃下、非接触式表面温度計(安立計器株式会社製)を用いて、赤外線照射時間による塗膜表面温度上昇を測定した。図3aにその結果を示した。照射の10秒のところで、塗膜表面温度は60℃近く上昇し、その後、照射時間とともに塗膜温度が90℃近くまで上昇した。さらに、表面温度が90℃まで上昇した塗膜表面に、一滴のエタノールを垂らしたところ、エタノール液は沸騰するように蒸発することを確認した。
[マンガンイオンをドープされた酸化チタン2-Ti-Mn200の合成]
実施例1でのエチレンイミン/マンガンイオンのモル比を1/200に変えた以外、同様な条件下、ドーピングを行い、マンガンドープルチル型酸化チタン結晶を作製した。この結晶粉末を20wt%含むKBrプレートを作製し、それのFT-IRを測定した。比較に、市販の酸化チタンdegusaP25(アナターゼとルチルの混合結晶)、ルチル型酸化チタン結晶を20wt%含むKBrプレートの測定を行なった。図4に示したように、2-Ti-Mn200が含まれたKBrプレートは中間波長域以外の範囲では赤外線を透過させなかった。比較の未ドープルチルまたは市販の酸化チタン(P25)の赤外線吸収は弱く、全体波長範囲で透過が主であることが示された。
実施例1と同様な方法で、塗膜を作製し、それに赤外線を100秒照射後の温度上昇を測ったところ、塗膜表面温度は70℃に達した。
上記実施例1のエチレンイミン/マンガンのモル比=1/2、1/5、1/10に変えた以外、同様な条件下で前駆体合成と空気下焼成(800℃)を行ない、マンガンイオンがドープされたルチル型酸化チタン結晶を得た。表1に、3種類のマンガンドープ量が異なる酸化チタンを示した(マンガンイオン含有率はMnOとした場合の換算値である)。
[コバルトイオンドープ酸化チタンの合成]
上記実施例1のMn(NO3)2の代わりに、硝酸コバルトを用い(ポリマー金属錯体中、エチレンイミン/Coのモル比=1/2,1/5、1/10)、同様な条件下で前駆体合成と空気下焼成(800℃)を行ない、ニッケルイオンがドープされたルチル型酸化チタン結晶を得た。表2に、3種類のコバルトドープ量が異なる酸化チタンを示した(コバルトイオン含有率はCo2O3とした場合の換算値である。)。
[ニッケルイオンドープ酸化チタンの合成]
上記実施例1のMn(NO3)2の代わりに、硝酸ニッケルを用い(ポリマー金属錯体中、エチレンイミン/Niのモル比=1/2,1/5、1/10)、同様な条件下で前駆体合成と空気下焼成(800℃)を行ない、ニッケルイオンがドープされたルチル型酸化チタン結晶を得た。表3に、3種類のニッケルドープ量が異なる酸化チタンを示した(ニッケルイオン含有率はNiOとした場合の換算値である。)。XRD測定から、これらの3種類の酸化チタンはルチル型結晶と一致する結晶であることが確認された。また、ルチル型酸化チタン結晶以外に、NiTiO3に相当する結晶の存在が確認された。各サンプル(10% in KBr)のFT-IR測定を行なったところ、いずれも中間赤外線波長以外には透過はなかった(図7)。これらのサンプルを用い、実施例1と同様の条件下塗膜作製を行い、赤外線照射における温度上昇を測ったところ、150秒照射時点での塗膜表面温度は70℃を越えた。
Claims (9)
- 遷移金属イオンがドーピングされたルチル型酸化チタン結晶を含有する赤外線吸収薄膜を製造する方法であって、
(I)アミノ基を有する塩基性ポリマー(x)と遷移金属イオンとの錯体(y)を水性媒体中に分散又は溶解させる工程、
(II)(I)で得られた水性分散体又は水性溶液と、水溶性チタン化合物(z)とを水性媒体中、50℃以下の温度条件下で混合し加水分解反応を行うことによって、アミノ基を有する塩基性ポリマー(x)と遷移金属イオンとの錯体(y)がチタニアに挟まれた、1~3nmの距離間隔を有するポリマー/チタニアの層状構造複合体を得る工程、
(III)前記層状構造複合体を空気雰囲気下で650℃以上の温度で加熱焼成することにより、層状構造に閉じ込まれた遷移金属イオンが酸化チタン結晶表面にドーピングされると同時にルチル型結晶相に成長させる工程、
(IV)前記で得られた結晶を粉砕して粉体とする工程、
(V)前記で得られた粉体を金属アルコキシドのゾル液及び/又は金属酸化物のナノ粒子の分散液と混合し、流動性液状組成物を調製する工程、
(VI)前記で得られた流動性液状組成物を基材表面に塗布する工程、
(VII)前記塗布膜を熟成する工程、
を有することを特徴とするルチル型酸化チタン結晶を含有する赤外線吸収薄膜の製造方法。 - 前記遷移金属イオンが、鉄、亜鉛、マンガン、銅、コバルト、バナジウム、タングステン及びニッケルからなる群から選ばれる一種以上の遷移金属のイオンである請求項1記載の赤外線吸収薄膜の製造方法。
- 前記ルチル型酸化チタン結晶にドーピングされた遷移金属イオンの含有率が0.1~20質量%である請求項1又は2記載の赤外線吸収薄膜の製造方法。
- 前記工程(IV)において、遷移金属イオンがドーピングされたルチル型酸化チタン結晶を100nm以下に粉砕するものである請求項1~3の何れか1項記載の赤外線吸収薄膜の製造方法。
- 前記工程(V)で用いる金属アルコキシドが、チタン、ジルコニウム及びケイ素からなる群から選ばれる1種以上の金属のアルコキシドである請求項1~4の何れか1項記載の赤外線吸収薄膜の製造方法。
- 前記工程(V)において、遷移金属イオンがドーピングされたルチル型酸化チタン結晶からなる粉体と、金属アルコキシドのゾル液及び/又は金属酸化物のナノ粒子の分散液との配合比率が、(ルチル型酸化チタン結晶からなる粉体)/(金属アルコキシドが形成する金属酸化物及び/又はナノ粒子である金属酸化物)の質量比として、95/5~98/2の範囲である請求項1~5の何れか1項記載の赤外線吸収薄膜の製造方法。
- 前記工程(V)において、流動性液状組成物中の固形分濃度を30~90質量%の範囲に調製する請求項1~6の何れか1項記載の赤外線吸収薄膜の製造方法。
- 請求項1~7の何れかの製造方法で得られる赤外線吸収塗膜であって、
該塗膜中に遷移金属イオンがドーピングされたルチル型酸化チタン結晶が90質量%以上含まれることを特徴とする赤外線吸収薄膜。 - 該塗膜が赤外線を吸収してから塗膜表面が発熱するものである請求項8記載の赤外線吸収薄膜。
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JP (1) | JP4812912B1 (ja) |
KR (1) | KR101290707B1 (ja) |
CN (1) | CN102712496A (ja) |
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Cited By (3)
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JP2013159496A (ja) * | 2012-02-02 | 2013-08-19 | Ishihara Sangyo Kaisha Ltd | 有彩色ルチル型二酸化チタン顔料及びその製造方法 |
WO2016002701A1 (ja) * | 2014-06-30 | 2016-01-07 | 富士フイルム株式会社 | 近赤外線吸収性組成物、近赤外線カットフィルタ、近赤外線カットフィルタの製造方法、固体撮像素子、カメラモジュール |
EP2913604B1 (en) * | 2012-10-26 | 2021-04-21 | Kabushiki Kaisha Toyota Jidoshokki | Use of heat-to-light conversion member |
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CN102712496A (zh) * | 2010-04-26 | 2012-10-03 | Dic株式会社 | 含有金红石型氧化钛晶体的红外线吸收薄膜及其制造方法 |
US9555406B2 (en) * | 2013-01-07 | 2017-01-31 | Nitto Denko Corporation | Method for forming an oxide coated substrate |
JP6225786B2 (ja) * | 2013-05-29 | 2017-11-08 | Toto株式会社 | 金属酸化物粒子の製造方法 |
TW201518763A (zh) * | 2013-11-07 | 2015-05-16 | Morrison Opto Electronics Ltd | 複合型濾光元件 |
CN108265268B (zh) * | 2018-02-28 | 2019-11-15 | 山西师范大学 | 一种V掺杂的TiO2薄膜及其制备方法 |
WO2020037054A1 (en) * | 2018-08-14 | 2020-02-20 | William Marsh Rice University | Distortion mitigation during sintering of ceramics through the incorporation of ceramic precursor solutions |
US11420879B2 (en) * | 2019-11-06 | 2022-08-23 | Robert Bosch Gmbh | Conductive, anticorrosive magnesium titanium oxide material |
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US11342566B2 (en) | 2019-11-06 | 2022-05-24 | Robert Bosch Gmbh | Conductive, anti-corrosive magnesium titanium oxide material |
US11440096B2 (en) * | 2020-08-28 | 2022-09-13 | Velta Holdings US Inc. | Method for producing alloy powders based on titanium metal |
CN112520685B (zh) * | 2020-12-04 | 2024-03-01 | 青岛大学 | 一种双层薄膜致动器及其制备方法 |
WO2024015009A1 (en) | 2022-07-13 | 2024-01-18 | Rise Research Institutes of Sweden AB | Self-heating coatings |
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- 2011-03-31 WO PCT/JP2011/058304 patent/WO2011135974A1/ja active Application Filing
- 2011-03-31 US US13/642,186 patent/US8618232B2/en not_active Expired - Fee Related
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JP2013159496A (ja) * | 2012-02-02 | 2013-08-19 | Ishihara Sangyo Kaisha Ltd | 有彩色ルチル型二酸化チタン顔料及びその製造方法 |
EP2913604B1 (en) * | 2012-10-26 | 2021-04-21 | Kabushiki Kaisha Toyota Jidoshokki | Use of heat-to-light conversion member |
WO2016002701A1 (ja) * | 2014-06-30 | 2016-01-07 | 富士フイルム株式会社 | 近赤外線吸収性組成物、近赤外線カットフィルタ、近赤外線カットフィルタの製造方法、固体撮像素子、カメラモジュール |
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Also Published As
Publication number | Publication date |
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CN102712496A (zh) | 2012-10-03 |
DE112011101441T5 (de) | 2013-04-11 |
JP4812912B1 (ja) | 2011-11-09 |
US20130040129A1 (en) | 2013-02-14 |
US8618232B2 (en) | 2013-12-31 |
KR101290707B1 (ko) | 2013-08-07 |
TW201144364A (en) | 2011-12-16 |
JPWO2011135974A1 (ja) | 2013-07-18 |
KR20120024959A (ko) | 2012-03-14 |
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