JP2013505884A - 複合焼結助剤及びそれを用いて低温でナノ結晶セラミックを製造する方法 - Google Patents
複合焼結助剤及びそれを用いて低温でナノ結晶セラミックを製造する方法 Download PDFInfo
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- JP2013505884A JP2013505884A JP2012528213A JP2012528213A JP2013505884A JP 2013505884 A JP2013505884 A JP 2013505884A JP 2012528213 A JP2012528213 A JP 2012528213A JP 2012528213 A JP2012528213 A JP 2012528213A JP 2013505884 A JP2013505884 A JP 2013505884A
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- 238000005245 sintering Methods 0.000 title claims abstract description 50
- 239000000919 ceramic Substances 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 239000003966 growth inhibitor Substances 0.000 claims abstract description 9
- 150000002739 metals Chemical class 0.000 claims abstract description 9
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 5
- 229910052738 indium Inorganic materials 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 4
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052772 Samarium Inorganic materials 0.000 claims description 2
- 229910052771 Terbium Inorganic materials 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 2
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 2
- 229910052706 scandium Inorganic materials 0.000 claims description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 2
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 2
- 230000000996 additive effect Effects 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 2
- 238000005498 polishing Methods 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 12
- 229910052574 oxide ceramic Inorganic materials 0.000 description 5
- 239000011224 oxide ceramic Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 238000009766 low-temperature sintering Methods 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
- 238000002156 mixing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000010298 pulverizing process Methods 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
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 1
- 229910002080 8 mol% Y2O3 fully stabilized ZrO2 Inorganic materials 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000005118 spray pyrolysis Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
【解決手段】Li、Na、Ga、In、Mn、Fe、Co、Ni、Cu、Zn、Biから選ばれた1種又は多種の金属の酸化物を含む焼結助剤と、Mg、Ca、Al、Zr、Yから選ばれた1種又は多種の金属の酸化物を含む結晶粒成長抑制剤とからなる、ことを特徴とする複合焼結助剤。
Description
平均結晶粒大きさ10nmのSmO1.5ドープCeO2粉体20mol%を硝酸コバルト(原料粉体の1mol%)及び硝酸マグネシウム(原料粉体の0.05mol%)と混合してから、エタノールを加えてボールミル粉砕を行い、その後、50℃の空気雰囲気下で乾燥させ、これで得られた乾粉を500℃で2時間焼結する。乾式圧縮方法により前記粉体をシートに圧延し、3℃/minの昇温速度で860℃に昇温し、4時間保温し、その後、5℃/minの速度で室温に降温し、これで得られたセラミック体は相対密度が98%より大きく、結晶粒サイズが約70 nmである。
平均結晶粒大きさ15nmのGdO1.5ドープCeO2粉体10mol%を硝酸リチウム(原料粉体の5mol%)及び硝酸アルミニウム(原料粉体の0.02mol%)と混合してから、エタノールを加えてボールミル粉砕を行い、その後、70℃の空気雰囲気下で乾燥させ、これで得られた乾粉を600℃で2時間焼結する。乾式圧縮方法により前記粉体をシートに圧延し、1℃/minの昇温速度で800℃に昇温し、5時間保温し、その後、5℃/minの速度で室温に降温し、これで得られたセラミック体は相対密度が98%より大きく、結晶粒サイズが約50 nmである。
平均結晶粒大きさ12nmのY203安定化ZrO2(8YSZ)粉体8mol%を硝酸銅(原料粉体の5mol%)及び硝酸イットリウム(原料粉体の1mol%)と混合してから、アセトンを加えてボールミル粉砕を行い、その後、60℃の空気雰囲気下で乾燥させ、これで得られた乾粉を500℃で2時間焼結する。乾式プレス方法により前記粉体をシートに圧延し、2℃/minの昇温速度で830℃に昇温し、10時間保温し、その後、5℃/minの速度で室温に降温し、これで得られたセラミック体は相対密度が95%より大きく、結晶粒サイズが約50 nmである。
Claims (8)
- Li、Na、Ga、In、Mn、Fe、Co、Ni、Cu、Zn、Biから選ばれた1種又は多種の金属の酸化物を含む焼結助剤と、Mg、Ca、Al、Zr、Yから選ばれた1種又は多種の金属の酸化物を含む結晶粒成長抑制剤とからなる、ことを特徴とする複合焼結助剤。
- セラミック原料に請求項1に記載の複合焼結助剤を添加して焼結させることによってナノ結晶セラミックが得られ、焼結温度が900℃以下である、ことを特徴とする請求項1に記載の複合焼結助剤を用いて低温でナノ結晶セラミックを製造する方法。
- 前記複合焼結助剤中の焼結助剤の添加量が、モル数で前記セラミック原料モル数の0.01〜20%であり、
前記複合焼結助剤中の結晶粒成長抑制剤の添加量が、モル数で前記セラミック原料モル数の0.01〜10%である、ことを特徴とする請求項2に記載の低温でナノ結晶セラミックを製造する方法。 - 前記ナノ結晶セラミックは、酸化セリウム、ドープ酸化セリウム、酸化ジルコニウム、ドープ酸化ジルコニウム、酸化アルミニウム、ドープ酸化アルミニウムから選ばれた少なくとも1種の材料を含み、
前記ドープ酸化セリウムのドープ元素は、ガドリニウム、サマリウム、イットリウム、カルシウム、プラセオジム、テルビウム、カルシウムから選ばれた1種または多種の元素を含み、
前記ドープ酸化ジルコニウムのドープ元素は、イットリウム、スカンジウム、セリウム、カルシウム、マグネシウムから選ばれた1種または多種の元素を含む、ことを特徴とする請求項3に記載の低温でナノ結晶セラミックを製造する方法。 - 先ず、前記セラミック原料を結晶粒サイズ1〜50nmの原料粉体に製造するステップと、
その次に、前記原料粉体を複合焼結助剤の金属塩または金属酸化物と混合して、エタノール、アセトンまたはイソプロパノールを加えて研磨或いはボールミル粉砕を行うステップと、
その後、50〜100℃の空気雰囲気下で乾燥させてから、900℃以下で1〜4時間焼結することで、金属塩を金属酸化物に分解するステップと、
前記焼結後の材料をセラミック塊又はフィルム生素地に製造し、前記生素地を1〜10℃/ minの昇温速度で700〜900℃に昇温し、この温度で1〜24時間保温し、その後、1〜30℃/ minの降温速度で室温に降温するステップとを含む、ことを特徴とする請求項2、3または4に記載の低温でナノ結晶セラミックを製造する方法。 - 前記原料粉体の混合物の焼結温度が400〜800℃である、ことを特徴とする請求項5に記載の低温でナノ結晶セラミックを製造する方法。
- 製造されたナノ結晶セラミックは、相対密度が95%以上で、結晶粒サイズが100nm以下である、ことを特徴とする請求項5に記載の低温でナノ結晶セラミックを製造する方法。
- 前記ナノ結晶セラミックは、好ましくは相対密度が98%以上で、結晶粒サイズが50 nm以下である、ことを特徴とする請求項7に記載の低温でナノ結晶セラミックを製造する方法。
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