JP5879078B2 - シュウ酸バリウムチタニルの製造方法及びチタン酸バリウムの製造方法 - Google Patents
シュウ酸バリウムチタニルの製造方法及びチタン酸バリウムの製造方法 Download PDFInfo
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- JP5879078B2 JP5879078B2 JP2011202451A JP2011202451A JP5879078B2 JP 5879078 B2 JP5879078 B2 JP 5879078B2 JP 2011202451 A JP2011202451 A JP 2011202451A JP 2011202451 A JP2011202451 A JP 2011202451A JP 5879078 B2 JP5879078 B2 JP 5879078B2
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- Prior art keywords
- barium
- liquid
- titanyl oxalate
- barium titanyl
- oxalic acid
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- 229910052788 barium Inorganic materials 0.000 title claims description 75
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 title claims description 73
- QKKWJYSVXDGOOJ-UHFFFAOYSA-N oxalic acid;oxotitanium Chemical compound [Ti]=O.OC(=O)C(O)=O QKKWJYSVXDGOOJ-UHFFFAOYSA-N 0.000 title claims description 66
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 title claims description 44
- 229910002113 barium titanate Inorganic materials 0.000 title claims description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 35
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 105
- 239000007788 liquid Substances 0.000 claims description 68
- 235000006408 oxalic acid Nutrition 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 24
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims description 21
- 229910001626 barium chloride Inorganic materials 0.000 claims description 21
- 238000010304 firing Methods 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 13
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000003125 aqueous solvent Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000010936 titanium Substances 0.000 description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000000843 powder Substances 0.000 description 17
- 239000000203 mixture Substances 0.000 description 14
- 238000003756 stirring Methods 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- 230000032683 aging Effects 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- GXUARMXARIJAFV-UHFFFAOYSA-L barium oxalate Chemical compound [Ba+2].[O-]C(=O)C([O-])=O GXUARMXARIJAFV-UHFFFAOYSA-L 0.000 description 6
- 229940094800 barium oxalate Drugs 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 description 5
- 150000004703 alkoxides Chemical class 0.000 description 4
- PWHCIQQGOQTFAE-UHFFFAOYSA-L barium chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Ba+2] PWHCIQQGOQTFAE-UHFFFAOYSA-L 0.000 description 4
- 239000003985 ceramic capacitor Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000007561 laser diffraction method Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000000790 scattering method Methods 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000001027 hydrothermal synthesis Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 238000010532 solid phase synthesis reaction Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- -1 with a high yield Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000003891 oxalate salts Chemical class 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000002468 ceramisation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
- C01G23/006—Alkaline earth titanates
-
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B35/462—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 based on titanates
- C04B35/465—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 based on titanates based on alkaline earth metal titanates
- C04B35/468—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 based on titanates based on alkaline earth metal titanates based on barium titanates
- C04B35/4682—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 based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/449—Organic acids, e.g. EDTA, citrate, acetate, oxalate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
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- C04B2235/761—Unit-cell parameters, e.g. lattice constants
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- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
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- Inorganic Compounds Of Heavy Metals (AREA)
Description
該B液の添加速度が、反応液の量0.38L当たり、3.7L/時間以上であり、
該B液中のチタン原子に対する該A液中のバリウム原子のモル比が1.1〜1.5であること、
を特徴とするシュウ酸バリウムチタニルの製造方法である。
本発明の製造方法は、少なくともシュウ酸及び塩化バリウムを含有する溶液(A液)に、四塩化チタンを含む水溶液(B液)を添加し反応を行うことを特徴とするものである。本発明の製造方法に従い製造されるシュウ酸バリウムチタニルは、好適にはTiに対するBaのモル比(以下、「Ba/Tiモル比」という)が0.998〜1.002、好ましくは略1であり、レーザー回折・散乱法により求められる平均粒径が4μm以下、好ましくは0.1〜4μmで微細なシュウ酸バリウムチタニルである。
なお、A液及びB液には、塩素イオン濃度の調整のため、塩素イオン源を添加することができる。塩素イオン源としては、例えば塩酸、塩化ナトリウム、塩化カリウム、塩化リチウム、塩素イオンを含む有機化合物等が挙げられる。
(A液の調製)
純水に、塩化バリウム2水塩と、シュウ酸2水塩を30℃で表1に示す割合となるように添加し、撹拌速度1.3m/秒で0.5時間撹拌して得られた懸濁液をA液とした。
(B液の調製)
市販の15重量%の四塩化チタン水溶液を純水で希釈することにより表1に示す組成のものをB液とした。
B液をA液へ表2に示す条件にて添加し、1時間熟成を行った。熟成終了後、濾過してシュウ酸バリウムチタニルを回収した。
次いで、回収したシュウ酸バリウムチタニルを純水でリパルプして入念に洗浄した。その後105℃で2時間乾燥してシュウ酸バリウムチタニルの粉末を得た。得られたシュウ酸バリウムチタニルの諸物性を表3に示す。BaとTiのモル比は蛍光X線で測定した。平均粒径は、レーザー回折・散乱法粒度分布測定装置で測定した。その結果を表3に併記した。
(A液の調製)
純水にシュウ酸2水塩を30℃で表1に示す割合で添加し、撹拌速度1.3m/秒で0.5時間撹拌して得られた懸濁液をA液とした。
(B液の調製)
純水に塩化バリウム2水塩と市販の15重量%の四塩化チタン水溶液を添加することにより得られた表1に示す組成のものをB液とした。
B液をA液へ表2に示す条件にて添加し、1時間熟成を行った。熟成終了後、濾過してシュウ酸バリウムチタニルを回収した。
次いで、回収したシュウ酸バリウムチタニルを純水でリパルプして入念に洗浄した。その後105℃で2時間乾燥してシュウ酸バリウムチタニルの粉末を得た。得られたシュウ酸バリウムチタニルの諸物性を表3に示す。BaとTiのモル比は蛍光X線で測定した。平均粒径は、レーザー回折・散乱法粒度分布測定装置で測定した。その結果を表3に併記した。
(A液の調製)
純水にシュウ酸2水塩と市販の15重量%の四塩化チタン水溶液を30℃で表1に示す割合で添加し、撹拌速度1.3m/秒で0.5時間撹拌して得られた液をA液とした。
(B液の調製)
純水に塩化バリウム2水塩を溶解させて得られた表1に示す組成のものをB液とした。
B液をA液へ表2に示す条件にて添加し、1時間熟成を行った。熟成終了後、濾過してシュウ酸バリウムチタニルを回収した。
次いで、回収したシュウ酸バリウムチタニルを純水でリパルプして入念に洗浄した。その後105℃で2時間乾燥してシュウ酸バリウムチタニルの粉末を得た。得られたシュウ酸バリウムチタニルの諸物性を表3に示す。BaとTiのモル比は蛍光X線で測定した。平均粒径は、レーザー回折・散乱法粒度分布測定装置で測定した。その結果を表3に併記した。
(A液の調製)
純水に塩化バリウム2水塩を30℃で表1に示す割合で添加し、撹拌速度1.3m/秒で0.5時間撹拌して得られた液をA液とした。
(B液の調製)
純水にシュウ酸2水塩と市販の15重量%の四塩化チタン水溶液を添加することにより得られた表1に示す組成のものをB液とした。
B液をA液へ表2に示す条件にて添加し、1時間熟成を行った。熟成終了後、濾過してシュウ酸バリウムチタニルを回収した。
次いで、回収したシュウ酸バリウムチタニルを純水でリパルプして入念に洗浄した。その後105℃で2時間乾燥してシュウ酸バリウムチタニルの粉末を得た。得られたシュウ酸バリウムチタニルの諸物性を表3に示す。BaとTiのモル比は蛍光X線で測定した。平均粒径は、レーザー回折・散乱法粒度分布測定装置で測定した。その結果を表3に併記した。
表3より比較例にて得られたシュウ酸バリウムチタニルは、レーザー回折・散乱法により求められる平均粒径が4μmより大きく、また、該シュウ酸バリウムチタニルの組成は、Ba/Tiモル比が0.997〜1.001であった。
<チタン酸バリウムの製造>
実施例1及び比較例1〜3で得られたシュウ酸バリウムチタニル試料の8gを、大気中、875或いは900℃で24時間で焼成した。冷却後、解砕してそれぞれチタン酸バリウムの粉末を得た。得られたチタン酸バリウムの諸物性を表4に示した。BaとTiのモル比は前記と同様な方法で求めた。平均粒径はSEM写真から、比表面積はBET法で求めた。また、得られたチタン酸バリウムについて、結晶性の指標であるc軸とa軸の長さの比(c軸/a軸比)をXRDによって測定した。
Claims (7)
- 少なくともシュウ酸及び塩化バリウムを含有する溶液(A液)に、四塩化チタンを含む水溶液(B液)を添加し反応を行うシュウ酸バリウムチタニルの製造方法であって、
該B液の添加速度が、反応液の量0.38L当たり、3.7L/時間以上であり、
該B液中のチタン原子に対する該A液中のバリウム原子のモル比が1.1〜1.5であること、
を特徴とするシュウ酸バリウムチタニルの製造方法。 - A液は、シュウ酸及び塩化バリウムを水溶媒中で接触させて得られるものであることを特徴とする請求項1記載のシュウ酸バリウムチタニルの製造方法。
- A液中の塩素イオン濃度に対するB液中の塩素イオン濃度の比(B/A)が重量比で0.50〜5であることを特徴とする請求項1記載のシュウ酸バリウムチタニルの製造方法。
- 反応温度が40℃以下であることを特徴とする請求項1乃至3いずれか1項記載のシュウ酸バリウムチタニルの製造方法。
- 生成されるシュウ酸バリウムチタニルは平均粒径が4μm以下であることを特徴とする請求項1乃至4いずれか1項記載のシュウ酸バリウムチタニルの製造方法。
- 請求項1乃至5の何れか1項に記載のシュウ酸バリウムチタニルを焼成することを特徴とするチタン酸バリウムの製造方法。
- 焼成温度が600〜1200℃であることを特徴とする請求項6記載のチタン酸バリウムの製造方法。
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