WO2010074231A1 - チタン酸アルミニウム系焼成体の製造方法 - Google Patents
チタン酸アルミニウム系焼成体の製造方法 Download PDFInfo
- Publication number
- WO2010074231A1 WO2010074231A1 PCT/JP2009/071595 JP2009071595W WO2010074231A1 WO 2010074231 A1 WO2010074231 A1 WO 2010074231A1 JP 2009071595 W JP2009071595 W JP 2009071595W WO 2010074231 A1 WO2010074231 A1 WO 2010074231A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- source powder
- aluminum
- powder
- titanium
- molar amount
- Prior art date
Links
- 229910000505 Al2TiO5 Inorganic materials 0.000 title claims abstract description 51
- 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 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 257
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 89
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 85
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000002994 raw material Substances 0.000 claims abstract description 64
- 239000010936 titanium Substances 0.000 claims abstract description 61
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 52
- 239000002245 particle Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000009826 distribution Methods 0.000 claims abstract description 19
- 230000001186 cumulative effect Effects 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims description 49
- 229910052749 magnesium Inorganic materials 0.000 claims description 48
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 45
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 43
- 239000010703 silicon Substances 0.000 claims description 43
- 229910052710 silicon Inorganic materials 0.000 claims description 43
- 238000010304 firing Methods 0.000 claims description 39
- 239000011521 glass Substances 0.000 claims description 23
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 16
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 239000010433 feldspar Substances 0.000 claims description 5
- 238000007561 laser diffraction method Methods 0.000 claims description 4
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 16
- 239000000919 ceramic Substances 0.000 abstract description 13
- 229940091250 magnesium supplement Drugs 0.000 description 45
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 37
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 29
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 18
- 239000013078 crystal Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 17
- -1 aluminum alkoxides Chemical class 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 14
- 235000010215 titanium dioxide Nutrition 0.000 description 14
- 239000000395 magnesium oxide Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 230000000630 rising effect Effects 0.000 description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000013001 point bending Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 229910052596 spinel Inorganic materials 0.000 description 5
- 239000011029 spinel Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 238000000634 powder X-ray diffraction Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 230000002902 bimodal effect Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- RCYJPSGNXVLIBO-UHFFFAOYSA-N sulfanylidenetitanium Chemical compound [S].[Ti] RCYJPSGNXVLIBO-UHFFFAOYSA-N 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229910020068 MgAl Inorganic materials 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 150000005215 alkyl ethers Chemical class 0.000 description 2
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 2
- 229940063655 aluminum stearate Drugs 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 150000003608 titanium Chemical class 0.000 description 2
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- QUVMSYUGOKEMPX-UHFFFAOYSA-N 2-methylpropan-1-olate;titanium(4+) Chemical compound [Ti+4].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-] QUVMSYUGOKEMPX-UHFFFAOYSA-N 0.000 description 1
- SDTMFDGELKWGFT-UHFFFAOYSA-N 2-methylpropan-2-olate Chemical compound CC(C)(C)[O-] SDTMFDGELKWGFT-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- RVDLHGSZWAELAU-UHFFFAOYSA-N 5-tert-butylthiophene-2-carbonyl chloride Chemical compound CC(C)(C)C1=CC=C(C(Cl)=O)S1 RVDLHGSZWAELAU-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 238000007088 Archimedes method Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- MPCRDALPQLDDFX-UHFFFAOYSA-L Magnesium perchlorate Chemical compound [Mg+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O MPCRDALPQLDDFX-UHFFFAOYSA-L 0.000 description 1
- MQHWFIOJQSCFNM-UHFFFAOYSA-L Magnesium salicylate Chemical compound [Mg+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O MQHWFIOJQSCFNM-UHFFFAOYSA-L 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- JPUHCPXFQIXLMW-UHFFFAOYSA-N aluminium triethoxide Chemical compound CCO[Al](OCC)OCC JPUHCPXFQIXLMW-UHFFFAOYSA-N 0.000 description 1
- 229940009827 aluminum acetate Drugs 0.000 description 1
- KMJRBSYFFVNPPK-UHFFFAOYSA-K aluminum;dodecanoate Chemical compound [Al+3].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O KMJRBSYFFVNPPK-UHFFFAOYSA-K 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- IOGARICUVYSYGI-UHFFFAOYSA-K azanium (4-oxo-1,3,2-dioxalumetan-2-yl) carbonate Chemical compound [NH4+].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O IOGARICUVYSYGI-UHFFFAOYSA-K 0.000 description 1
- 229910001680 bayerite Inorganic materials 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- ZCLVNIZJEKLGFA-UHFFFAOYSA-H bis(4,5-dioxo-1,3,2-dioxalumolan-2-yl) oxalate Chemical compound [Al+3].[Al+3].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O ZCLVNIZJEKLGFA-UHFFFAOYSA-H 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- XZTWHWHGBBCSMX-UHFFFAOYSA-J dimagnesium;phosphonato phosphate Chemical compound [Mg+2].[Mg+2].[O-]P([O-])(=O)OP([O-])([O-])=O XZTWHWHGBBCSMX-UHFFFAOYSA-J 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- FZFYOUJTOSBFPQ-UHFFFAOYSA-M dipotassium;hydroxide Chemical compound [OH-].[K+].[K+] FZFYOUJTOSBFPQ-UHFFFAOYSA-M 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present invention relates to a method for producing a fired body made of an aluminum titanate ceramic, and more specifically, a fired body made of an aluminum titanate ceramic by firing a molded body of a raw material mixture containing an aluminum source powder and a titanium source powder. It relates to a method of manufacturing.
- Aluminum titanate-based ceramics are known as ceramics that contain titanium and aluminum as constituent elements and have a crystal pattern of aluminum titanate in the X-ray diffraction spectrum, and have excellent heat resistance.
- Aluminum titanate-based ceramics have been used as a sintering tool such as a crucible, but in recent years, fine carbon particles contained in exhaust gas discharged from internal combustion engines such as diesel engines are collected. As a material constituting a ceramic filter for industrial use, industrial utility value is increasing.
- Patent Document 1 a method of firing a raw material mixture containing a powder of a titanium source compound such as titania and an aluminum source compound such as alumina is known (Patent Document 1).
- Aluminum titanate has a high melting point of 1860 ° C. and is excellent in heat resistance as described above, but usually decomposes into alumina (Al 2 O 3 ) and titania (TiO 2 ) at a temperature around 800 to 1200 ° C. It is known that it is a material that exhibits behavior and has extremely low thermal decomposition resistance.
- an object of the present invention is to provide a method capable of producing a fired body made of an aluminum titanate-based ceramic having excellent thermal decomposition resistance and high mechanical strength.
- the present invention provides a method for producing an aluminum titanate-based fired body that includes a step of firing a molded body of a raw material mixture containing an aluminum source powder and a titanium source powder, and the aluminum source powder satisfies the following formula (1). . (D90 / D10) 1/2 ⁇ 2 (1)
- D90 is a particle diameter corresponding to a volume-based cumulative percentage of 90%
- D10 is a particle diameter corresponding to a volume-based cumulative percentage of 10%
- these are aluminum measured by a laser diffraction method. It is obtained from the particle size distribution of the source powder.
- the ratio of the molar amount of the aluminum source powder to the molar amount of the titanium source powder (the molar amount of the aluminum source powder / the molar amount of the titanium source powder) in the raw material mixture is 35/65 to 45/55. preferable.
- the raw material mixture may further contain a magnesium source powder.
- the ratio of the molar amount of the magnesium source powder to the total of the molar amount of the aluminum source powder and the molar amount of the titanium source powder is preferably 0.03 to 0.15.
- the molar amount of the aluminum source powder means the molar amount in terms of Al 2 O 3 (alumina), and is determined by the following formula (A) (hereinafter the same applies when determining the molar amount).
- Molar amount of aluminum source powder (w 1 ⁇ M 1 ) / (N 1 ⁇ 2) (A)
- w 1 represents the amount (g) of aluminum source powder used
- M 1 represents the number of moles of aluminum in 1 mole of aluminum source powder
- N 1 represents the formula amount of aluminum source powder.
- the molar amount of each aluminum source powder is calculated
- the molar amount of the titanium source powder means a molar amount in terms of TiO 2 (titania), and is determined by the following formula (B) (hereinafter the same applies when determining the molar amount).
- Molar amount of titanium source powder (w 2 ⁇ M 2 ) / N 2 (B)
- w 2 represents the amount (g) of the titanium source powder used
- M 2 represents the number of moles of titanium in 1 mole of the titanium source powder
- N 2 represents the formula amount of the titanium source powder.
- the molar amount of each titanium source powder is determined according to the formula (B), and the molar amount of the used titanium source powder can be determined by summing the respective molar amounts.
- the molar amount of the magnesium source powder means a molar amount in terms of MgO (magnesia), and is determined by the following formula (C) (hereinafter, the same applies when determining the molar amount).
- Molar amount of magnesium source powder (w 3 ⁇ M 3 ) / N 3 (C)
- w 3 represents the amount (g) of magnesium source powder used
- M 3 represents the number of moles of magnesium in 1 mole of magnesium source powder
- N 3 represents the formula amount of magnesium source powder.
- the volume-based cumulative particle size equivalent to 50% of the titanium source powder and the magnesium source powder (hereinafter referred to as D50) is preferably 0.5 to 35 ⁇ m.
- the raw material mixture may further contain a silicon source powder.
- the silicon source powder is preferably feldspar, glass frit, or a mixture thereof.
- the ratio of the molar amount of the silicon source powder in terms of SiO 2 to the total molar amount of the aluminum source powder in terms of Al 2 O 3 and the molar amount of the titanium source powder in terms of TiO 2 is about 0.0011 to about 0.123. It is preferable that The D50 of the silicon source powder is preferably 0.5 to 30 ⁇ m.
- the molar amount of the silicon source powder means a molar amount in terms of SiO 2 (silica), and is determined by the following formula (D) (hereinafter, the same applies when determining the molar amount).
- Molar amount of silicon source powder (w 4 ⁇ M 4 ) / N 4 (D)
- w 4 represents the amount (g) of silicon source powder used
- M 4 represents the number of moles of silicon in 1 mole of silicon source powder
- N 4 represents the formula amount of silicon source powder.
- D50 means a particle diameter corresponding to a volume-based cumulative percentage of 50% measured by a laser diffraction method.
- the shape of the molded body of the raw material mixture can be, for example, a honeycomb shape.
- the firing temperature is, for example, 1300 to 1650 ° C.
- the firing time is, for example, 10 minutes to 24 hours.
- FIG. 1 is a graph showing the particle size distribution of the aluminum oxide powders A to C used in Example 1, Example 2, and Comparative Example 1.
- the aluminum titanate-based fired body of the present invention is produced by firing a molded body of a raw material mixture containing an aluminum source powder and a titanium source powder.
- An aluminum titanate-based fired body obtained using such a raw material mixture is a fired body made of an aluminum titanate-based crystal.
- the aluminum source powder contained in the raw material mixture used in the present invention is a powder of a substance that becomes an aluminum component constituting the aluminum titanate-based fired body.
- the aluminum source powder include alumina (aluminum oxide) powder.
- Alumina may be crystalline or amorphous (amorphous).
- the crystal type include ⁇ type, ⁇ type, ⁇ type, ⁇ type, etc., and ⁇ type alumina is preferably used.
- the aluminum source powder used in the present invention may be a powder of a substance led to alumina by firing in air.
- examples of such substances include aluminum salts, aluminum alkoxides, aluminum hydroxide, and aluminum.
- the aluminum salt may be a salt with an inorganic acid (inorganic salt) or a salt with an organic acid (organic salt).
- the aluminum inorganic salt include nitrates such as aluminum nitrate and ammonium aluminum nitrate; carbonates such as ammonium aluminum carbonate and the like.
- the aluminum organic salt include aluminum oxalate, aluminum acetate, aluminum stearate, aluminum lactate, and aluminum laurate.
- aluminum alkoxide examples include aluminum isopropoxide, aluminum ethoxide, aluminum sec-butoxide, aluminum tert-butoxide, and the like.
- Aluminum hydroxide may be crystalline or amorphous.
- the crystal type include a gibbsite type, a bayerite type, a norosotrandite type, a boehmite type, and a pseudoboehmite type.
- the amorphous aluminum hydroxide include an aluminum hydrolyzate obtained by hydrolyzing an aqueous solution of a water-soluble aluminum compound such as an aluminum salt or an aluminum alkoxide.
- the aluminum source powder only one kind may be used, or two or more kinds may be used in combination.
- alumina powder is preferably used as the aluminum source powder, and more preferably ⁇ -type alumina powder.
- the aluminum source powder can contain trace components derived from the raw materials or inevitably contained in the production process.
- an aluminum source powder satisfying the following formula (1) is used as the aluminum source powder.
- D90 is a particle size equivalent to 90% of the volume-based cumulative percentage
- D10 is a particle size equivalent to a volume-based cumulative percentage of 10%, and these are obtained from the particle size distribution measured by the laser diffraction method. .
- the above formula (1) means that D90 / D10 is relatively large, and indicates that the particle size range of the aluminum source powder used is relatively wide. (D90 / D10)
- D90 / D10 By using an aluminum source powder having a relatively broad particle size range in which 1/2 is 2 or more, the filling property of the raw material powder in the raw material mixture compact to be fired is improved. It is possible to obtain a fired body that is dense and therefore has high mechanical strength. Moreover, heat resistant decomposition property can also be improved by using the aluminum source powder which satisfy
- the aluminum source powder particles are present so as to surround the titanium source powder particles in the aluminum titanate reaction by firing the compact of the raw material mixture. Since the reaction proceeds promptly without the particles moving greatly, a fired body having high strength (for example, bending strength) can be obtained. In addition, while exhibiting good pore characteristics, a dense fired body can be obtained, and thus the obtained aluminum titanate-based fired body exhibits a small thermal expansion coefficient.
- (D90 / D10) 1/2 in the above formula (1) is preferably 2.5 or more and preferably 4 or less.
- (D90 / D10) 1/2 exceeds 4
- the effect of improving the mechanical strength (bending strength) of the fired body tends to decrease. This is presumably because the filling property of the raw material powder in the molded body is lowered, and the aluminum titanate reaction hardly proceeds.
- the aluminum source powder used in the present invention may have a single modal particle size distribution or a bimodal particle size distribution as long as the above formula (1) is satisfied. Alternatively, it may have three or more particle size peaks.
- Such an aluminum source powder can be prepared, for example with the following method.
- (C) A method in which an aluminum source powder guided to aluminum oxide by firing is fired for a predetermined time.
- the method of baking aluminum hydroxide powder for a predetermined time can be mentioned.
- the D50 of the aluminum source powder (for example, aluminum hydroxide powder) led to the aluminum oxide by firing is preferably about 5 to 60 ⁇ m.
- (D) A method of granulating an aluminum source powder having a relatively small particle diameter under predetermined conditions.
- (E) A method of obtaining an aluminum source powder satisfying the above formula (1) by coprecipitation.
- the D50 of the aluminum source powder is preferably 5 to 35 ⁇ m, more preferably 10 to 30 ⁇ m.
- the titanium source powder contained in the raw material mixture is a powder of a substance that becomes a titanium component constituting the aluminum titanate-based fired body, and examples of such a substance include titanium oxide powder.
- examples of titanium oxide include titanium (IV) oxide, titanium (III) oxide, and titanium (II) oxide, and titanium (IV) oxide is preferably used.
- Titanium (IV) oxide may be crystalline or amorphous (amorphous). When the titanium (IV) oxide is crystalline, examples of the crystalline form include anatase, rutile, and brookite, and more preferred are anatase and rutile titanium (IV) oxides.
- the titanium source powder used in the present invention may be a powder of a substance that is led to titania (titanium oxide) by firing in air.
- titania titanium oxide
- examples of such substances include titanium salts, titanium alkoxides, titanium hydroxide, titanium nitride, titanium sulfide, and titanium.
- titanium salt examples include titanium trichloride, titanium tetrachloride, titanium sulfide (IV), titanium sulfide (VI), and titanium sulfate (IV).
- titanium alkoxide examples include titanium (IV) ethoxide, titanium (IV) methoxide, titanium (IV) t-butoxide, titanium (IV) isobutoxide, titanium (IV) n-propoxide, titanium (IV) tetraiso Examples thereof include propoxide and chelates thereof.
- titanium source powder only one kind may be used, or two or more kinds may be used in combination.
- the titanium source powder a titanium oxide powder is preferably used, and a titanium (IV) oxide powder is more preferable.
- the titanium source powder may contain a trace component derived from the raw material or inevitably contained in the production process.
- the particle size of the titanium source powder is not particularly limited, but usually a powder having a D50 of 0.5 to 35 ⁇ m is used. In order to obtain an aluminum titanate-based fired body excellent in thermal decomposition resistance and mechanical strength (bending strength), it is preferable to use a titanium source powder having a D50 of 1 to 25 ⁇ m.
- the particle size distribution of the titanium source powder may be bimodal. In the case of being bimodal, the peak particle size of the larger particle size is preferably 20 to 35 ⁇ m.
- the ratio of the molar amount of the aluminum source powder to the molar amount of the titanium source powder in the raw material mixture is 35/65 to 45/55.
- the ratio is 40/60 to 45/55.
- the raw material mixture may contain a magnesium source powder.
- the obtained aluminum titanate-based fired body is a fired body made of aluminum magnesium titanate crystals.
- the magnesium source powder include magnesia (magnesium oxide) powder and a powder of a substance introduced into magnesia by firing in air. Examples of the latter include magnesium salt, magnesium alkoxide, magnesium hydroxide, magnesium nitride, magnesium and the like.
- magnesium salts include magnesium chloride, magnesium perchlorate, magnesium phosphate, magnesium pyrophosphate, magnesium oxalate, magnesium nitrate, magnesium carbonate, magnesium acetate, magnesium sulfate, magnesium citrate, magnesium lactate, magnesium stearate, Examples include magnesium salicylate, magnesium myristate, magnesium gluconate, magnesium dimethacrylate, and magnesium benzoate.
- the magnesium alkoxide include magnesium methoxide and magnesium ethoxide.
- the magnesium source powder may contain a trace component derived from the raw material or unavoidably contained in the production process.
- the magnesium source powder a powder of a substance serving as both a magnesium source and an aluminum source can be used.
- An example of such a substance is magnesia spinel (MgAl 2 O 4 ).
- the Al 2 O 3 equivalent molar amount of the aluminum source powder and the powder of the substance serving as the magnesium source and the aluminum source are used.
- the ratio of the total amount of Al 2 O 3 converted molar amount of the Al component contained and the TiO 2 converted molar amount of the titanium source powder is adjusted to be within the above range in the raw material mixture.
- magnesium source powder only one kind may be used, or two or more kinds may be used in combination.
- the particle size of the magnesium source powder is not particularly limited. Usually, a powder having a D50 of 0.5 to 30 ⁇ m is used, and in order to obtain an aluminum titanate-based fired body excellent in thermal decomposition resistance and mechanical strength. It is preferable to use a magnesium source powder having a D50 of 3 to 25 ⁇ m.
- the content (molar amount) of the magnesium source powder in the raw material mixture is 0.03 to 0.15 as a molar ratio with respect to the sum of the molar amount of the aluminum source powder and the molar amount of the titanium source powder. Preferably, it is 0.03 to 0.12.
- the raw material mixture may further contain a silicon source powder.
- the silicon source powder is a powder of a substance contained in the aluminum titanate-based fired body as a silicon component. By using the silicon source powder in combination, it is possible to obtain an aluminum titanate-based fired body with improved thermal decomposition resistance. It becomes possible.
- Examples of the silicon source powder include powders of silicon oxide (silica) such as silicon dioxide and silicon monoxide.
- the silicon source powder may be a powder of a substance that is guided to silica by firing in air.
- examples of such substances include silicic acid, silicon carbide, silicon nitride, silicon sulfide, silicon tetrachloride, silicon acetate, sodium silicate, sodium orthosilicate, feldspar, and glass frit.
- feldspar, glass frit and the like are preferably used, and glass frit and the like are more preferably used in terms of industrial availability and stable composition.
- Glass frit means flakes or powdery glass obtained by pulverizing glass. It is also preferable to use a powder made of a mixture of feldspar and glass frit as the silicon source powder.
- the yield point of the glass frit is measured using a thermomechanical analyzer (TMA: Thermo Mechanical Analysis).
- TMA thermomechanical analyzer
- the yield point of the glass frit is defined as the temperature (° C.) at which the expansion stops and the subsequent contraction starts during the temperature rising process of the glass frit.
- a general silicate glass containing silicate [SiO 2 ] as a main component (when it exceeds 50 mass% in all components) can be used.
- the glass constituting the glass frit is composed of alumina [Al 2 O 3 ], sodium oxide [Na 2 O], potassium oxide [K 2 O], and oxidation as components other than silicic acid, as in general silicate glass.
- Calcium [CaO], magnesia [MgO] and the like may be included.
- the glass constituting the glass frit may contain ZrO 2 in order to improve the hot water resistance of the glass itself.
- silicon source powder only one type may be used, or two or more types may be used in combination.
- the particle size of the silicon source powder is not particularly limited, but those having a D50 of 0.5 to 30 ⁇ m are usually used, and in order to further improve the filling rate of the molded body of the raw material mixture, the D50 is 1 to 20 ⁇ m. It is preferable to use a silicon source powder.
- the SiO 2 equivalent silicon source powder with respect to the total of the molar amount of the Al 2 O 3 equivalent aluminum source powder and the TiO 2 equivalent titanium source powder in the raw material mixture
- the molar ratio is preferably about 0.0011 to about 0.123, more preferably 0.073 or less.
- the silicon source powder may contain trace components that are derived from the raw materials or inevitably contained in the production process.
- a material containing two or more metal elements among titanium, aluminum, silicon and magnesium as a raw material powder such as a composite oxide such as magnesia spinel (MgAl 2 O 4 ), is used. be able to.
- a substance can be considered to be equivalent to a raw material mixture obtained by mixing the respective metal source substances.
- the raw material mixture may contain aluminum titanate or aluminum magnesium titanate itself.
- the aluminum magnesium titanate when aluminum magnesium titanate is used as a constituent of the raw material mixture, the aluminum magnesium titanate contains a titanium source, It is a raw material that combines an aluminum source and a magnesium source.
- the aluminum source powder, the titanium source powder, and the raw material mixture containing the magnesium source powder and the silicon source powder that are optionally used are molded to obtain a molded body, and then the molded body is fired.
- An aluminum titanate-based fired body is obtained.
- shrinkage during firing can be suppressed as compared to direct firing of the raw material mixture. Therefore, cracking of the obtained aluminum titanate-based fired body can be effectively suppressed.
- the pore shape of the porous aluminum titanate crystal produced by firing is maintained.
- the shape of the formed body is not particularly limited, and examples thereof include a honeycomb shape, a rod shape, a tube shape, a plate shape, and a crucible shape.
- Examples of the molding machine used for molding the raw material mixture include a uniaxial press, an extrusion molding machine, a tableting machine, and a granulator.
- additives such as a pore former, a binder, a lubricant and a plasticizer, a dispersant, and a solvent can be added to the raw material mixture.
- pore former examples include carbon materials such as graphite; resins such as polyethylene, polypropylene, polystyrene, and polymethyl methacrylate; plant materials such as starch, nut shells, walnut shells, and corn; ice; and dry ice. Is mentioned.
- the amount of pore-forming agent added is usually 0 to 40 parts by mass, preferably 0 to 25 parts by mass with respect to 100 parts by mass of the total amount of aluminum source powder, titanium source powder, magnesium source powder and silicon source powder. It is.
- a pore making material may contain the trace component contained unavoidable in the raw material origin or manufacturing process.
- binder examples include celluloses such as methyl cellulose, carboxymethyl cellulose, and sodium carboxymethyl cellulose; alcohols such as polyvinyl alcohol; salts such as lignin sulfonate; waxes such as paraffin wax and microcrystalline wax; EVA, polyethylene, polystyrene, liquid crystal Examples thereof include thermoplastic resins such as polymers and engineering plastics.
- the addition amount of the binder is usually 2 parts by mass or more and 20 parts by mass or less, preferably 4 parts by mass or more, with respect to 100 parts by mass of the total amount of the aluminum source powder, the titanium source powder, the magnesium source powder and the silicon source powder. 15 parts by mass or less.
- a binder can contain the trace component contained unavoidable in the raw material origin or manufacturing process.
- the lubricant and plasticizer examples include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, alginic acid, oleic acid, and stearic acid; and stearic acid metal salts such as aluminum stearate. .
- the addition amount of the lubricant and the plasticizer is usually 0 to 10 parts by mass, preferably 1 to 5 parts per 100 parts by mass of the total amount of the aluminum source powder, the titanium source powder, the magnesium source powder and the silicon source powder. Part by mass. Note that the lubricant and the plasticizer can contain trace components derived from the raw materials or inevitably contained in the production process.
- the dispersant examples include inorganic acids such as nitric acid, hydrochloric acid and sulfuric acid; organic acids such as oxalic acid, citric acid, acetic acid, malic acid and lactic acid; alcohols such as methanol, ethanol and propanol; ammonium polycarboxylate; Surfactants such as polyoxyalkylene alkyl ethers may be mentioned.
- the addition amount of the dispersant is usually 0 to 20 parts by mass, preferably 2 to 8 parts by mass with respect to 100 parts by mass of the total amount of the aluminum source powder, titanium source powder, magnesium source powder and silicon source powder. is there.
- a dispersing agent can contain the trace component contained unavoidable in the raw material origin or manufacturing process.
- the solvent for example, monools (methanol, ethanol, butanol, propanol, etc.), alcohols such as glycols (propylene glycol, polypropylene glycol, ethylene glycol, etc.), water, and the like can be used. Of these, water is preferable, and ion-exchanged water is more preferably used from the viewpoint of few impurities.
- the amount of the solvent used is usually 10 parts by mass to 100 parts by mass, preferably 20 parts by mass to 80 parts by mass with respect to 100 parts by mass of the total amount of the aluminum source powder, titanium source powder, magnesium source powder and silicon source powder. It is.
- the raw material mixture used for molding can be obtained by mixing (kneading) the aluminum source powder, titanium source powder, and optionally used magnesium source powder, silicon source powder, and the various additives described above. .
- the firing temperature in firing the molded body is usually 1300 ° C. or higher, preferably 1400 ° C. or higher.
- the firing temperature is usually 1650 ° C. or lower, preferably 1550 ° C. or lower.
- the temperature rising rate and the temperature rising pattern up to the firing temperature are not particularly limited, but the temperature rising rate is usually 1 ° C./hour to 500 ° C./hour.
- the firing step includes a degreasing step for removing the same.
- Degreasing is typically performed in a temperature rising stage (for example, a temperature range of 150 to 500 ° C.) up to the firing temperature.
- a temperature rising stage for example, a temperature range of 150 to 500 ° C.
- Firing is usually performed in the atmosphere, but depending on the type of raw material powder used (ie, aluminum source powder, titanium source powder, magnesium source powder and silicon source powder) and the ratio of the amount used, inert gases such as nitrogen gas and argon gas are used. It may be fired in a gas, or may be fired in a reducing gas such as carbon monoxide gas or hydrogen gas. Further, the firing may be performed in an atmosphere in which the water vapor partial pressure is lowered.
- inert gases such as nitrogen gas and argon gas are used. It may be fired in a gas, or may be fired in a reducing gas such as carbon monoxide gas or hydrogen gas. Further, the firing may be performed in an atmosphere in which the water vapor partial pressure is lowered.
- Calcination is usually performed using a normal firing furnace such as a tubular electric furnace, a box-type electric furnace, a tunnel furnace, a far-infrared furnace, a microwave heating furnace, a shaft furnace, a reflection furnace, a rotary furnace, or a roller hearth furnace. Firing may be performed batchwise or continuously. Moreover, you may carry out by a stationary type and may carry out by a fluid type.
- a normal firing furnace such as a tubular electric furnace, a box-type electric furnace, a tunnel furnace, a far-infrared furnace, a microwave heating furnace, a shaft furnace, a reflection furnace, a rotary furnace, or a roller hearth furnace.
- Firing may be performed batchwise or continuously.
- you may carry out by a stationary type and may carry out by a fluid type.
- the time required for firing is sufficient as long as the molded body of the raw material mixture transitions to the aluminum titanate crystal, and varies depending on the amount of the raw material mixture, the type of the firing furnace, the firing temperature, the firing atmosphere, Usually, it is 10 minutes to 24 hours.
- the target aluminum titanate-based fired body can be obtained.
- Such an aluminum titanate-based fired body has a shape that substantially maintains the shape of the molded body immediately after molding.
- the obtained aluminum titanate-based fired body can be processed into a desired shape by grinding or the like.
- the aluminum titanate-based fired body obtained by the method of the present invention may contain a crystal pattern of alumina, titania or the like in addition to the crystal pattern of aluminum titanate or aluminum magnesium titanate in the X-ray diffraction spectrum.
- the aluminum titanate-based fired body obtained by the method of the present invention is composed of aluminum magnesium titanate crystals, it can be represented by the composition formula: Al 2 (1-x) Mg x Ti (1 + x) O 5 , The value of x is 0.03 or more, preferably 0.03 or more and 0.15 or less, more preferably 0.03 or more and 0.12 or less.
- the aluminum titanate-based fired body was cut into a rectangular parallelepiped shape having a length of about 50 mm, a width of about 5 mm, and a thickness of about 5 mm in the extrusion direction when the raw material mixture was extruded.
- the outer surface of the cut fired body was polished with sandpaper (# 1500) until there was no unevenness.
- the three-point bending strength of the obtained sample was measured by a method based on JIS R 1601.
- Open porosity 100 ⁇ (M3-M1) / (M3-M2)
- Example 1 The following were used as the raw material powder.
- Aluminum source powder Aluminum oxide powder A ( ⁇ -alumina powder) having a particle size distribution shown in Table 1 and FIG.
- the obtained formed body was fired in an air atmosphere including a calcination (degreasing) step of removing the binder to obtain a honeycomb-shaped porous fired body (honeycomb structure).
- the maximum temperature during firing was 1450 ° C., and the holding time at the maximum temperature was 5 hours.
- the obtained porous fired body was crushed in a mortar, and when the diffraction spectrum of the obtained powder was measured by a powder X-ray diffraction method, the powder showed a crystal peak of aluminum magnesium titanate.
- the AT conversion rate of this powder was determined to be 100%.
- Table 1 and FIG. 1 show the particle size distribution characteristics of the aluminum oxide powder A used.
- Table 2 shows the thermal decomposition rate, three-point bending strength, thermal expansion coefficient, and open porosity of the obtained aluminum titanate-based fired body.
- Example 2 A honeycomb-shaped porous fired body was obtained in the same manner as in Example 1 except that the following raw material powder was used.
- Aluminum oxide powder B ⁇ -alumina powder having a particle size distribution shown in Table 1 and FIG.
- the obtained porous fired body was crushed in a mortar, and when the diffraction spectrum of the obtained powder was measured by a powder X-ray diffraction method, the powder showed a crystal peak of aluminum magnesium titanate.
- the AT conversion rate of this powder was determined to be 100%.
- Table 1 and FIG. 1 show the particle size distribution characteristics of the aluminum oxide powder B used.
- Table 2 shows the thermal decomposition rate, three-point bending strength, thermal expansion coefficient, and open porosity of the obtained aluminum titanate-based fired body.
- Example 1 A honeycomb-shaped porous fired body was obtained in the same manner as in Example 1 except that the following raw material powder was used.
- Aluminum source powder Aluminum oxide powder C ( ⁇ -alumina powder) having the particle size distribution shown in Table 1 and FIG.
- the obtained porous fired body was crushed in a mortar, and when the diffraction spectrum of the obtained powder was measured by a powder X-ray diffraction method, the powder showed a crystal peak of aluminum magnesium titanate.
- the AT conversion rate of this powder was determined to be 100%.
- Table 1 and FIG. 1 show the particle size distribution characteristics of the aluminum oxide powder C used.
- Table 2 shows the thermal decomposition rate, three-point bending strength, thermal expansion coefficient, and open porosity of the obtained aluminum titanate-based fired body.
- An aluminum titanate-based fired body obtained by the present invention includes, for example, firing furnace jigs such as crucibles, setters, mortars, and furnace materials; exhaust gas filters used for exhaust gas purification of internal combustion engines such as diesel engines and gasoline engines Exhaust gas converters, catalyst carriers, filtration filters used for the filtration of food and drink such as beer, gas permeation generated during petroleum refining, such as selective permeation filters for selectively permeating carbon monoxide, carbon dioxide, nitrogen, oxygen, etc. Ceramic filter; It can be suitably applied to electronic parts such as substrates and capacitors.
- the aluminum titanate-based fired body of the present invention when used as a ceramic filter, is excellent in thermal decomposition resistance and mechanical strength (bending strength), and further has excellent low thermal expansion properties, so that it has good filter performance. Can be maintained over a long period of time.
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Abstract
Description
(D90/D10)1/2≧2 (1)
ここで、上記式(1)中、D90は体積基準の累積百分率90%相当粒子径であり、D10は体積基準の累積百分率10%相当粒子径であり、これらはレーザー回折法により測定されるアルミニウム源粉末の粒度分布から求まる。
アルミニウム源粉末のモル量=(w1×M1)/(N1×2)・・・(A)
式(A)中、w1はアルミニウム源粉末の使用量(g)を表し、M1はアルミニウム源粉末1モル中のアルミニウムのモル数を表し、N1はアルミニウム源粉末の式量を表す。2種以上のアルミニウム源粉末を用いる場合、式(A)により各アルミニウム源粉末のモル量をそれぞれ求め、各モル量を合計することによって、用いたアルミニウム源粉末のモル量を求めることができる。
チタニウム源粉末のモル量=(w2×M2)/N2・・・(B)
式(B)中、w2はチタニウム源粉末の使用量(g)を表し、M2はチタニウム源粉末1モル中のチタニウムのモル数を表し、N2はチタニウム源粉末の式量を表す。2種以上のチタニウム源粉末を用いる場合、式(B)により各チタニウム源粉末のモル量をそれぞれ求め、各モル量を合計することによって、用いたチタニウム源粉末のモル量を求めることができる。
マグネシウム源粉末のモル量=(w3×M3)/N3・・・(C)
式(C)中、w3はマグネシウム源粉末の使用量(g)を表し、M3はマグネシウム源粉末1モル中のマグネシウムのモル数を表し、N3はマグネシウム源粉末の式量を表す。2種以上のマグネシウム源粉末を用いる場合、式(C)により各マグネシウム源粉末のモル量をそれぞれ求め、各モル量を合計することによって、用いたマグネシウム源粉末のモル量を求めることができる。
ケイ素源粉末のモル量=(w4×M4)/N4・・・(D)
式(D)中、w4はケイ素源粉末の使用量(g)を表し、M4はケイ素源粉末1モル中のケイ素のモル数を表し、N4はケイ素源粉末の式量を表す。2種以上のケイ素源粉末を用いる場合、式(D)により各ケイ素源粉末のモル量をそれぞれ求め、各モル量を合計することによって、用いたケイ素源粉末のモル量を求めることができる。
上記式(1)中、D90は体積基準の累積百分率90%相当粒子径であり、D10は体積基準の累積百分率10%相当粒子径であり、これらはレーザー回折法により測定される粒度分布から求まる。
(a)異なる粒径分布を有するアルミニウム源粉末を混合する方法。たとえば、D50が0.5~10μmであるアルミニウム源粉末と、D50が10~60μmの範囲内であるアルミニウム源粉末とを混合する方法を挙げることができる。
(b)粒径が比較的大きなアルミニウム源粉末を所定時間解砕する方法。たとえば、D50が15~75μmであるアルミニウム源粉末を所定時間解砕する方法を挙げることができる。
(c)焼成により酸化アルミニウムに導かれるアルミニウム源粉末を所定時間焼成する方法。たとえば、水酸化アルミニウム粉末を所定時間焼成する方法を挙げることができる。焼成により酸化アルミニウムに導かれるアルミニウム源粉末(たとえば、水酸化アルミニウム粉末)のD50は、5~60μm程度であることが好ましい。
(d)粒径が比較的小さなアルミニウム源粉末を所定条件で造粒する方法。
(e)共沈法により、上記式(1)を満たすアルミニウム源粉末を得る方法。
チタン酸アルミニウム化率(AT化率)は、粉末X線回折スペクトルにおける2θ=27.4°の位置に現れるピーク〔チタニア・ルチル相(110)面に帰属される〕の積分強度(IT)と、2θ=33.7°の位置に現れるピーク〔チタン酸アルミニウムマグネシウム相(230)面に帰属される〕の積分強度(IAT)とから、下記式により算出した。AT化率=IAT/(IT+IAT)×100(%)
得られたチタン酸アルミニウム系焼成体から、約4mm×約4mm×約50mmの試験片を切り出した。ついで、この試験片に対して、300℃/hの昇温速度で1100℃まで昇温し、同温度で48時間保持した後、300℃/hの降温速度で室温まで冷却する熱処理を施した。当該熱処理を行なう前のAT化率R0(%)と熱処理を行なった後のAT化率R(%)を上記方法により測定し、熱処理による焼成体中のチタンアルミニウムマグネシウム結晶の減少率として、下記式に基づき、耐熱分解率を求めた。
耐熱分解率(%)=(R/R0)×100
チタン酸アルミニウム系焼成体から、原料混合物の押し出し成形時の押出し方向に長さ約50mm、幅約5mm、厚さ約5mm程度の直方体形状に切り出した。この切り出した焼成体の外表面を紙やすり(#1500)を用いて凹凸がなくなるまで研磨した。得られたサンプルの三点曲げ強度を、JIS R 1601に準拠した方法により測定した。
チタン酸アルミニウム系焼成体から、約4mm×約4mm×約10mmの試験片を切り出した。ついで、この試験片に対して、200℃/hの昇温速度で1000℃まで昇温し、直ちに室温(25℃)まで冷却する熱処理を施した。熱処理を施した試験片について、熱機械的分析装置(SIIテクノロジー(株)製 TMA6300)を用いて、25℃から1000℃まで600℃/hの速度で昇温させた際の試験片の膨張率から、下記式に基づき、熱膨張係数〔K-1〕を算出した。
熱膨張係数〔K-1〕=試験片の膨張率/975〔K〕
ここで、試験片の膨張率とは、
(1000℃まで昇温させたときの試験片の体積-昇温前(25℃)における試験片の体積)/(昇温前(25℃)における試験片の体積)
を意味する。
JIS R1634に準拠した、水中浸漬によるアルキメデス法により、焼成体の水中重量M2(g)、飽水重量M3(g)および乾燥重量M1(g)を測定し、下記式により開気孔率を算出した。
開気孔率(%)=100×(M3-M1)/(M3-M2)
原料粉末の、粒径分布、D10、D50、およびD90は、レーザ回折式粒度分布測定装置〔日機装社製「Microtrac HRA(X-100)」〕を用いて測定した。
原料粉末として以下のものを用いた。下記の原料粉末の仕込み組成は、アルミナ〔Al2O3〕、チタニア〔TiO2〕、マグネシア〔MgO〕およびシリカ〔SiO2〕換算のモル比で、〔Al2O3〕/〔TiO2〕/〔MgO〕/〔SiO2〕=34.3%/50.2%/9.4%/6.1%である。
(1)アルミニウム源粉末
下記表1および図1に示される粒径分布を有する酸化アルミニウム粉末A(α-アルミナ粉末)
29質量部
(2)チタニウム源粉末
D50が1.0μmである酸化チタン粉末(ルチル型結晶)
49質量部
(3)マグネシウム源粉末
D50が5.5μmのマグネシアスピネル粉末
18質量部
(4)ケイ素源粉末
D50が8.5μmのガラスフリット(タカラスタンダード社製「CK0832」)
4質量部
以下の原料粉末を用いたこと以外は、実施例1と同様にしてハニカム形状の多孔質焼成体を得た。下記の原料粉末の仕込み組成は、実施例1と同じく、アルミナ〔Al2O3〕、チタニア〔TiO2〕、マグネシア〔MgO〕およびシリカ〔SiO2〕換算のモル比で、〔Al2O3〕/〔TiO2〕/〔MgO〕/〔SiO2〕=34.3%/50.2%/9.4%/6.1%である。
(1)アルミニウム源粉末
下記表1および図1に示される粒径分布を有する酸化アルミニウム粉末B(α-アルミナ粉末)
29質量部
(2)チタニウム源粉末
D50が1.0μmである酸化チタン粉末(ルチル型結晶)
49質量部
(3)マグネシウム源粉末
D50が5.5μmのマグネシアスピネル粉末
18質量部
(4)ケイ素源粉末
D50が8.5μmのガラスフリット(タカラスタンダード社製「CK0832」)
4質量部
以下の原料粉末を用いたこと以外は、実施例1と同様にしてハニカム形状の多孔質焼成体を得た。下記の原料粉末の仕込み組成は、実施例1と同じく、アルミナ〔Al2O3〕、チタニア〔TiO2〕、マグネシア〔MgO〕およびシリカ〔SiO2〕換算のモル比で、〔Al2O3〕/〔TiO2〕/〔MgO〕/〔SiO2〕=34.3%/50.2%/9.4%/6.1%である。
(1)アルミニウム源粉末
下記表1および図1に示される粒径分布を有する酸化アルミニウム粉末C(α-アルミナ粉末)
29質量部
(2)チタニウム源粉末
D50が1.0μmである酸化チタン粉末(ルチル型結晶)
49質量部
(3)マグネシウム源粉末
D50が5.5μmのマグネシアスピネル粉末
18質量部
(4)ケイ素源粉末
D50が8.5μmのガラスフリット(タカラスタンダード社製「CK0832」)
4質量部
Claims (11)
- アルミニウム源粉末およびチタニウム源粉末を含む原料混合物の成形体を焼成する工程を備え、
前記アルミニウム源粉末は、下記式(1)を満たすチタン酸アルミニウム系焼成体の製造方法。
(D90/D10)1/2≧2 (1)
(式中、D90は体積基準の累積百分率90%相当粒子径であり、D10は体積基準の累積百分率10%相当粒子径であり、これらはレーザー回折法により測定されるアルミニウム源粉末の粒度分布から求まる。) - 前記原料混合物中における、Al2O3換算での前記アルミニウム源粉末のモル量とTiO2換算での前記チタニウム源粉末のモル量との比(アルミニウム源粉末のモル量/チタニウム源粉末のモル量)は、35/65~45/55である請求項1に記載の方法。
- 前記チタニウム源粉末の体積基準の累積百分率50%相当粒子径が、0.5~35μmである請求項1又は2に記載の方法。
- 前記原料混合物は、マグネシウム源粉末をさらに含み、
Al2O3換算での前記アルミニウム源粉末のモル量とTiO2換算での前記チタニウム源粉末のモル量との合計に対する、MgO換算での前記マグネシウム源粉末のモル量の比は、0.03~0.15である請求項1~3のいずれかに記載の方法。 - 前記マグネシウム源粉末の体積基準の累積百分率50%相当粒子径が、0.5~30μmである請求項4に記載の方法。
- 前記原料混合物は、ケイ素源粉末をさらに含む請求項1~5のいずれかに記載の方法。
- 前記ケイ素源粉末は、長石またはガラスフリット、もしくはそれらの混合物である請求項6に記載の方法。
- Al2O3換算のアルミニウム源粉末のモル量とTiO2換算のチタニウム源粉末のモル量との合計に対する、SiO2換算のケイ素源粉末のモル量の比は、0.0011~0.123である請求項6又は7に記載の方法。
- 前記ケイ素源粉末の体積基準の累積百分率50%相当粒子径が、0.5~30μmである請求項6~8のいずれかに記載の方法。
- 前記成形体がハニカム形状である請求項1~9のいずれかに記載の方法。
- 前記焼成の温度が1300~1650℃であり、焼成時間が10分~24時間である請求項1~10のいずれかに記載の方法。
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2008
- 2008-12-25 JP JP2008330981A patent/JP5368081B2/ja not_active Expired - Fee Related
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2009
- 2009-12-25 KR KR1020117012461A patent/KR20110104485A/ko not_active Application Discontinuation
- 2009-12-25 CN CN2009801523206A patent/CN102264669A/zh active Pending
- 2009-12-25 US US13/141,927 patent/US20120028784A1/en not_active Abandoned
- 2009-12-25 TW TW098145081A patent/TW201038506A/zh unknown
- 2009-12-25 EP EP09835027A patent/EP2386529A4/en active Pending
- 2009-12-25 WO PCT/JP2009/071595 patent/WO2010074231A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005046667A (ja) * | 2003-07-29 | 2005-02-24 | Ohcera Co Ltd | 排ガス浄化触媒用ハニカム担体及びその製造方法 |
JP2005087797A (ja) * | 2003-09-12 | 2005-04-07 | Ohcera Co Ltd | 排ガス浄化触媒用ハニカム担体及びその製造方法 |
WO2005105704A1 (ja) | 2004-04-28 | 2005-11-10 | Ohcera Co., Ltd. | チタン酸アルミニウムマグネシウム結晶構造物及びその製造方法 |
JP2008239408A (ja) * | 2007-03-27 | 2008-10-09 | Kyocera Corp | 耐熱性セラミック部材 |
JP2008239401A (ja) * | 2007-03-27 | 2008-10-09 | Kyocera Corp | 耐熱性セラミック部材 |
Non-Patent Citations (1)
Title |
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See also references of EP2386529A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015529627A (ja) * | 2012-09-21 | 2015-10-08 | コーニング インコーポレイテッド | チタン酸アルミニウムの特性を制御するための混合アルミナ |
Also Published As
Publication number | Publication date |
---|---|
EP2386529A4 (en) | 2012-06-27 |
JP5368081B2 (ja) | 2013-12-18 |
US20120028784A1 (en) | 2012-02-02 |
JP2010150088A (ja) | 2010-07-08 |
EP2386529A1 (en) | 2011-11-16 |
TW201038506A (en) | 2010-11-01 |
KR20110104485A (ko) | 2011-09-22 |
CN102264669A (zh) | 2011-11-30 |
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