JP4202920B2 - 耐熱材料用前駆体の組成に入れるためにか焼粉砕したアルミナと、そのようなアルミナを得る方法 - Google Patents
耐熱材料用前駆体の組成に入れるためにか焼粉砕したアルミナと、そのようなアルミナを得る方法 Download PDFInfo
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Description
(1.1 様々な添加物を加えて、あるいは加えずにアルミナをバッチ粉砕する)
バイエル社のもので、アルミニウム・ペシネイ社の参照記号AC34のギブサイトから、か焼されたアルミナ(アルミナ99.6%、ソーダ2500ppm、シリカ100ppm、石灰160ppm、三二酸化鉄120ppm)を用いる。微結晶の平均サイズは2.7μである。粉砕前の粒子のD50は70μに近い。
バイエル社のもので、アルミニウム・ペシネイ社の参照記号がそれぞれAC34とAC44のギブサイトから得られた二つのか焼アルミナをこの実施例での測定対象とする。AC34はアルミナ99.6%、AC44はアルミナ99.5%を有する。どちらもシリカ100ppm、石灰160ppm、三二酸化鉄120ppmを有している。ソーダ含有量(AC34については2500ppmで、AC44は4000ppm)と、粒度(AC44の粉砕前の粒子のD50が45μに近い)を除くと、二つの間に基本的な違いはない。
連続粉砕は、エネルギー消費の点でも、人件費の点でも、バッチ粉砕より安くできる方法である。これにより、大量のか焼粉砕アルミナをより安く得る方法を提案することが可能になる。出力選択装置を備えた玉入り粉砕機を用いるものであるが、製品の粒度が選択装置の切断直径を上回る場合は、それを再度、粉砕機の入り口に導入し、また改めて通過させる。この実施例では、(実施例1で述べたアルミニウム・ペシネイ社の参照記号で)AC34のか焼アルミナを連続粉砕するが、その目的は、粒子が6μの平均直径を呈する、か焼粉砕アルミナAC34B6を得ることである。
添加物(オキシラニルアルキルシラン)の30gの塊を、噴霧ノズルを用いて、60kgのか焼粉砕アルミナAC34B6に添加した。添加物とアルミナをバッチ・ミキサーの中で一時間、混ぜ合わせられた。用いたミキサーは、MORITZ(登録商標)ブランドのV字型TURBULAであり、容量は100リットルある。それを毎時600回転の回転速度で回転させる。
気体相クロマトグラフィーと質量スペクトル測定とを組み合わせる。
アルミナ粉末15gをセルロースのカートリッジの中に入れると、抽出はSoxtecによって実現され、これにより、沸騰したメタノール80mlの中にサンプルを液浸(30分)させること、そして、抽出カートリッジがまた持ち上がり、サンプルを溶媒の逆流によりすすぐこと(45分)が可能となる。
・ アルミナの使用特性の改善。
・ 鉱化剤と添加物の量が非常に僅かであるため、か焼アルミナの化学的性質に乱れがない。
・ 粉砕中に埃が起きない。
・ 粉砕機の内壁に粉末が堆積しない。
Claims (10)
- 耐熱材料用前駆体の組成に入れるための、化学式C 9 H 20 O 5 Siのオキシラニルアルキルシランを有する、添加物を加えてか焼粉砕したアルミナ。
- 前記オキシラニルアルキルシランが、0.01〜1重量%含まれていることを特徴とする、請求項1に記載の添加物を加えてか焼粉砕したアルミナ。
- 前記オキシラニルアルキルシランが、0.01〜0.1重量%含まれていることを特徴とする、請求項1に記載の添加物を加えてか焼粉砕したアルミナ。
- 150立方センチメートルの円筒形容器からの排出時間で表した懸濁液としての流動性が、添加物のない、か焼粉砕アルミナに比べて少なくとも二倍より少なくなっている、請求項1から請求項3のいずれか一つに記載の添加物を加えてか焼粉砕したアルミナ。
- 水酸化アルミニウムを、1/2時間から4時間、800℃と1300℃の間に含まれる温度でか焼し、耐熱材料用前駆体の組成に入れるための、か焼粉砕したアルミナを得る方法であり、そのようにして得られたか焼アルミナをつぎに化学式C 9 H 20 O 5 Siのオキシラニルアルキルシランのもとで粉砕することを特徴とする、アルミナを得る方法。
- 鉱化剤の役割を果たすハロゲン化合物のもとで前記アルミナをか焼する、請求項5に記載のアルミナを得る方法。
- 鉱化剤の役割を果たすハロゲン化合物が、フッ素、フッ化水素酸、三フッ化アルミニウム、フッ化アルカリのいずれかから選んだフッ素化合物である、請求項6に記載のアルミナを得る方法。
- 鉱化剤の導入が、ハロゲンガスの体積比率が0.001%と0.2%の間に含まれる、炉の中が僅かにフッ化された環境を作り出す請求項7に記載のアルミナを得る方法。
- 化学式C 9 H 20 O 5 Siのオキシラニルアルキルシランを有することを特徴とする、請求項5から請求項8のいずれか一つに記載のアルミナを得る方法で得られた添加物を加えてか焼粉砕したアルミナ。
- 請求項1から請求項4および請求項9のいずれか一つに記載の添加物を加えてか焼粉砕したアルミナを用いることを特徴とする、耐熱材料用前駆体を得る方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0113450A FR2831156B1 (fr) | 2001-10-18 | 2001-10-18 | Alumine calcinee broyee destinee a entrer dans la composition d'un precurseur pour materiau refractaire, et procede d'obtention de ladite alumine |
PCT/FR2002/003550 WO2003033405A1 (fr) | 2001-10-18 | 2002-10-17 | Alumine calcinee broyee destinee a entrer dans la composition d'un precurseur pour materiau refractaire, et procede d'obtention de ladite alumine |
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JP2005505488A JP2005505488A (ja) | 2005-02-24 |
JP4202920B2 true JP4202920B2 (ja) | 2008-12-24 |
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JP2003536153A Expired - Fee Related JP4202920B2 (ja) | 2001-10-18 | 2002-10-17 | 耐熱材料用前駆体の組成に入れるためにか焼粉砕したアルミナと、そのようなアルミナを得る方法 |
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Country | Link |
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US (1) | US7125539B2 (ja) |
EP (1) | EP1436230B1 (ja) |
JP (1) | JP4202920B2 (ja) |
KR (1) | KR100890408B1 (ja) |
CA (1) | CA2463566C (ja) |
FR (1) | FR2831156B1 (ja) |
WO (1) | WO2003033405A1 (ja) |
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DE102005039435A1 (de) | 2005-08-18 | 2007-03-01 | Clariant International Limited | Verfahren zur Herstellung von mit Silanen oberflächenmodifiziertem Nanokorund |
DE102005033393B4 (de) * | 2005-07-16 | 2014-04-03 | Clariant International Limited | Verfahren zur Herstellung von nanokristallinem α-Al2O3 |
EP1922369A1 (de) * | 2005-08-18 | 2008-05-21 | Clariant International Ltd. | Oberflächenmodifizierte nanopartikel aus aluminiumoxid und oxiden von elementen der i. und ii. hauptgruppe des periodensystems sowie deren herstellung |
PL1922368T3 (pl) * | 2005-08-18 | 2017-06-30 | Clariant Finance (Bvi) Limited | Masy powłokowe, zawierające nanocząstki tlenków mieszanych, składające się z 50-99,9 % wag. al203 i 0,1-50 % wag. tlenków pierwiastków i-szej lub ii-giej grupy głównej układu okresowego |
CN105565785B (zh) * | 2015-12-25 | 2016-08-17 | 山东硅元新型材料有限责任公司 | 陶瓷膜支撑体的制备方法 |
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US5541249A (en) * | 1990-12-18 | 1996-07-30 | Hoechst Celanese Corp. | Injection moldable ceramic and metallic compositions and method of preparing the same |
US5252655A (en) * | 1992-03-16 | 1993-10-12 | Aluminum Company Of America | Densified ceramic green sheet and stack having conductors therein |
US5543173A (en) * | 1993-10-12 | 1996-08-06 | Aluminum Company Of America | Surface treating aluminum trihydrate powders with prehydrolized silane |
FR2755435A1 (fr) | 1996-11-04 | 1998-05-07 | Pechiney Aluminium | Fabrication d'alumine calcinee a taille de cristallite reglee a la demande avec une faible dispersion |
DE19828257A1 (de) * | 1998-06-25 | 1999-12-30 | Bayer Ag | Werkstoffe zur Konstruktion und Isolation, ein Verfahren zur Herstellung und deren Verwendung sowie ein Bindemittel zur Herstellung von Werkstoffen |
FR2807749B1 (fr) * | 2000-04-12 | 2002-06-07 | Pechiney Aluminium | Pate precurseur de materiau refractaire |
US6420078B1 (en) | 2000-12-28 | 2002-07-16 | Xerox Corporation | Toner compositions with surface additives |
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- 2002-10-17 WO PCT/FR2002/003550 patent/WO2003033405A1/fr active Application Filing
- 2002-10-17 KR KR1020047005425A patent/KR100890408B1/ko active IP Right Grant
- 2002-10-17 JP JP2003536153A patent/JP4202920B2/ja not_active Expired - Fee Related
- 2002-10-17 CA CA2463566A patent/CA2463566C/fr not_active Expired - Fee Related
- 2002-10-17 US US10/491,897 patent/US7125539B2/en not_active Expired - Lifetime
- 2002-10-17 EP EP02785552.7A patent/EP1436230B1/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2831156A1 (fr) | 2003-04-25 |
US7125539B2 (en) | 2006-10-24 |
US20040247520A1 (en) | 2004-12-09 |
KR100890408B1 (ko) | 2009-03-26 |
EP1436230A1 (fr) | 2004-07-14 |
CA2463566C (fr) | 2011-03-29 |
CA2463566A1 (fr) | 2003-04-24 |
EP1436230B1 (fr) | 2015-03-04 |
FR2831156B1 (fr) | 2004-02-20 |
WO2003033405A1 (fr) | 2003-04-24 |
KR20050037403A (ko) | 2005-04-21 |
JP2005505488A (ja) | 2005-02-24 |
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