JP5187463B2 - 化学強化用ガラス - Google Patents
化学強化用ガラス Download PDFInfo
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- JP5187463B2 JP5187463B2 JP2012535484A JP2012535484A JP5187463B2 JP 5187463 B2 JP5187463 B2 JP 5187463B2 JP 2012535484 A JP2012535484 A JP 2012535484A JP 2012535484 A JP2012535484 A JP 2012535484A JP 5187463 B2 JP5187463 B2 JP 5187463B2
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- 239000011521 glass Substances 0.000 title claims abstract description 345
- 238000003426 chemical strengthening reaction Methods 0.000 title claims abstract description 97
- 238000002834 transmittance Methods 0.000 claims abstract description 25
- 229910052788 barium Inorganic materials 0.000 claims abstract description 15
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 15
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 15
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 15
- 230000008033 biological extinction Effects 0.000 claims description 66
- 229910020599 Co 3 O 4 Inorganic materials 0.000 claims description 45
- 229910052742 iron Inorganic materials 0.000 claims description 43
- 238000010521 absorption reaction Methods 0.000 claims description 41
- 230000003595 spectral effect Effects 0.000 claims description 24
- 239000005345 chemically strengthened glass Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 13
- 238000005728 strengthening Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 11
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 11
- 229910052753 mercury Inorganic materials 0.000 claims description 11
- 238000007373 indentation Methods 0.000 claims description 10
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000006260 foam Substances 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 140
- 230000000694 effects Effects 0.000 description 65
- 239000010410 layer Substances 0.000 description 38
- 239000006103 coloring component Substances 0.000 description 36
- 238000012937 correction Methods 0.000 description 32
- 238000000034 method Methods 0.000 description 28
- 230000007423 decrease Effects 0.000 description 24
- 238000005342 ion exchange Methods 0.000 description 19
- 238000004031 devitrification Methods 0.000 description 16
- 238000005352 clarification Methods 0.000 description 15
- 229910052804 chromium Inorganic materials 0.000 description 12
- 238000000465 moulding Methods 0.000 description 12
- 229910010413 TiO 2 Inorganic materials 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 238000002835 absorbance Methods 0.000 description 9
- 229910017052 cobalt Inorganic materials 0.000 description 9
- 239000010941 cobalt Substances 0.000 description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 229910018068 Li 2 O Inorganic materials 0.000 description 8
- 230000031700 light absorption Effects 0.000 description 8
- 229910044991 metal oxide Inorganic materials 0.000 description 8
- 150000004706 metal oxides Chemical class 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 239000006025 fining agent Substances 0.000 description 6
- 239000000156 glass melt Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 229910052720 vanadium Inorganic materials 0.000 description 6
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 5
- 229910006404 SnO 2 Inorganic materials 0.000 description 5
- 229910052797 bismuth Inorganic materials 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 238000005034 decoration Methods 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 229910052748 manganese Inorganic materials 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000005361 soda-lime glass Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004040 coloring Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 229910052691 Erbium Inorganic materials 0.000 description 3
- 229910052779 Neodymium Inorganic materials 0.000 description 3
- GCPXMJHSNVMWNM-UHFFFAOYSA-N arsenous acid Chemical compound O[As](O)O GCPXMJHSNVMWNM-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052711 selenium Inorganic materials 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000004813 Moessbauer spectroscopy Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- 206010040925 Skin striae Diseases 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000008395 clarifying agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000000383 hazardous chemical Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
- C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/02—Compositions for glass with special properties for coloured glass
-
- 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
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
-
- 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
- Y10T428/31—Surface property or characteristic of web, sheet or block
- Y10T428/315—Surface modified glass [e.g., tempered, strengthened, etc.]
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Surface Treatment Of Glass (AREA)
- Liquid Crystal (AREA)
Description
また、風冷強化では、冷却温度のばらつきにより、ガラス板の平面性を損なう懸念が大きい。特に厚みの薄いガラス板については、平面性が損なわれる懸念が大きく、本発明の目的である質感が損なわれる可能性がある。これらの点から、ガラス板は、後者の化学強化法によって強化することが好ましい。
ΔT(550/600)(%)=[{A(550/600)−B(550/600)}/A(550/600)]×100 ・・・(1)
ΔT(450/600)(%)=[{A(450/600)−B(450/600)}/A(450/600)]×100 ・・・(2)
(上記式(1)において、A(550/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値であり、B(550/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値である。上記式(2)において、A(450/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値であり、B(450/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値である。)
ΔT(550/600)(%)=[{A(550/600)−B(550/600)}/A(550/600)]×100 ・・・(1)
ΔT(450/600)(%)=[{A(450/600)−B(450/600)}/A(450/600)]×100 ・・・(2)
ΔT(550/600)(%)=[{A(550/600)−B(550/600)}/A(550/600)]×100 ・・・(1)
ΔT(450/600)(%)=[{A(450/600)−B(450/600)}/A(450/600)]×100 ・・・(2)
(上記式(1)において、A(550/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値であり、B(550/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値である。上記式(2)において、A(450/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値であり、B(450/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値である。)
Claims (8)
- 下記酸化物基準のモル百分率表示で、SiO2を60〜80%、Al2O3を3〜15%、B 2 O 3 を0〜12%、Na2Oを5〜15%、K2Oを0〜4%、MgOを0〜15%、CaOを0〜3%、ΣRO(Rは、Mg、Ca、Sr、Ba、Zn)を0〜18%、ZrO2を0〜1%、Fe2O3を1.5〜6%、Co3O4を0.1〜1%含有することを特徴とする化学強化用ガラス。
- 下記酸化物基準のモル百分率表示で、SiO2を55〜75%、Al2O3を8〜16%、B2O3を4〜12%、Na2Oを7〜16%、K2Oを0〜4%、MgOを0〜3%、CaOを0〜3%、ΣRO(Rは、Mg、Ca、Sr、Ba、Zn)を0〜5%、ZrO2を0〜1%、Fe2O3を1.5〜6%、Co3O4を0.1〜1%含有することを特徴とする化学強化用ガラス。
- Co3O4/Fe2O3比が0.01〜0.5であることを特徴とする請求項1又は2に記載の化学強化用ガラス。
- 波長380nm〜780nmにおける吸光係数の最小値が1mm−1以上であることを特徴とする請求項1ないし3のいずれか1項に記載の化学強化用ガラス。
- 波長550nmの吸光係数/波長600nmの吸光係数、波長450nmの吸光係数/波長600nmの吸光係数が、いずれも0.7〜1.2の範囲内であることを特徴とする請求項1ないし4のいずれか1項に記載の化学強化用ガラス。
- 下記式(1)、(2)で示される吸光係数の相対値の変化量ΔT(550/600)、ΔT(450/600)が絶対値で5%以下であることを特徴とする請求項1ないし5のいずれか1項に記載の化学強化用ガラス。
ΔT(550/600)(%)=[{A(550/600)−B(550/600)}/A(550/600)]×100 ・・・(1)
ΔT(450/600)(%)=[{A(450/600)−B(450/600)}/A(450/600)]×100 ・・・(2)
(上記式(1)において、A(550/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値であり、B(550/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長550nmにおける吸光係数と波長600nmにおける吸光係数との相対値である。上記式(2)において、A(450/600)は、400W高圧水銀ランプの光を100時間照射した後のガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値であり、B(450/600)は、光照射前の前記ガラスの分光透過率曲線から算出される、波長450nmにおける吸光係数と波長600nmにおける吸光係数の相対値である。) - 前記化学強化用ガラスを厚み1mmのガラス板にしたものの鏡面仕上げ表面にビッカース圧子を用いて圧痕を形成した際のクラックの発生率が50%となるビッカース圧子の荷重が150gf以上であることを特徴とする請求項1ないし6のいずれか1項に記載の化学強化用ガラス。
- 請求項1ないし7のいずれか1項に記載の化学強化用ガラスを化学強化処理して得られる化学強化ガラスであって、
化学強化処理により前記化学強化ガラス表面に形成された表面圧縮応力層の深さが30μm以上であり、前記表面圧縮応力層の表面圧縮応力が550MPa以上であることを特徴とする化学強化ガラス。
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