JP5211467B2 - 多面体形状α−アルミナの製造方法 - Google Patents
多面体形状α−アルミナの製造方法 Download PDFInfo
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Description
[アルミナ原料及び鉱化剤]
アルミナ原料及び鉱化剤として、下記の表1に示すものを用いた。
n=log[log(100/16)/log(100/84)]/log(d84%/d16%)
また、実施例3、5及び7及び比較例1、3、9及び11で得られた焼成アルミナ(α-アルミナ)について撮影されたSEM写真をそれぞれ図1〜7に示す。
Claims (4)
- 擬ベーマイト、γアルミナ、及びθアルミナから選ばれた1種又は2種以上の混合物からなるアルミナ原料にフッ素化合物又はフッ素化合物及びホウ素化合物をアルミナ換算基準で0.1〜2.0質量%の範囲で添加し、得られた原料混合物を充填嵩比重比90%以下で焼成容器に充填し、焼成温度1100℃以上で焼成することを特徴とする、8面体以上の多面体形状を有して粒度分布の狭い多面体形状α-アルミナの製造方法。
- アルミナ原料は、BET比表面積が50m2/g以上である請求項1に記載の多面体形状α−アルミナの製造方法。
- アルミナ原料は、レーザー散乱法で測定された平均粒子径が予め40μm以下に調整されている請求項1に記載の多面体形状α−アルミナの製造方法。
- 原料混合物の焼成は、原料混合物を密閉型焼成容器に充填して定置炉により行われる請求項1〜3のいずれかに記載の多面体形状α−アルミナの製造方法。
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JP2006315847A JP5211467B2 (ja) | 2006-11-22 | 2006-11-22 | 多面体形状α−アルミナの製造方法 |
PCT/JP2007/072311 WO2008062735A1 (en) | 2006-11-22 | 2007-11-16 | POLYHEDRAL α-ALUMINA AND PROCESS FOR PRODUCTION THEREOF |
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JP2006315847A JP5211467B2 (ja) | 2006-11-22 | 2006-11-22 | 多面体形状α−アルミナの製造方法 |
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JP2008127257A JP2008127257A (ja) | 2008-06-05 |
JP5211467B2 true JP5211467B2 (ja) | 2013-06-12 |
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JP5720848B2 (ja) * | 2012-09-28 | 2015-05-20 | Dic株式会社 | 多面体形状のα−アルミナ微粒子の製造方法 |
CN105658715B (zh) | 2013-10-24 | 2017-11-28 | Dic株式会社 | 树脂组合物、散热材料及散热构件 |
JP6121074B1 (ja) | 2015-09-16 | 2017-04-26 | 大日精化工業株式会社 | アルミナ系熱伝導性酸化物及びその製造方法 |
JP6085708B1 (ja) * | 2016-04-01 | 2017-02-22 | 株式会社フジミインコーポレーテッド | 合金材料用研磨組成物及び合金材料の研磨方法 |
JP6209695B1 (ja) | 2017-03-02 | 2017-10-04 | 大日精化工業株式会社 | アルミナ系熱伝導性酸化物及びその製造方法 |
CN109650424B (zh) * | 2019-01-30 | 2021-05-14 | 山东利尔新材股份有限公司 | 一种无定型氧化铝八面体颗粒及其制备方法 |
CN114656246B (zh) * | 2022-04-01 | 2022-12-06 | 广东工业大学 | 一种正八面体α氧化铝及其制备方法和应用 |
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ATE26819T1 (de) * | 1982-08-24 | 1987-05-15 | Alusuisse | Verfahren zur herstellung von kristalliner tonerde. |
DE3870637D1 (de) * | 1987-01-29 | 1992-06-11 | Sumitomo Chemical Co | Verfahren zur herstellung von aluminiumoxid. |
FR2652075B1 (fr) * | 1989-09-21 | 1991-12-06 | Atochem | Macrocristaux d'alumine alpha sous forme de plaquettes et procede d'obtention. |
JPH06191833A (ja) * | 1992-06-02 | 1994-07-12 | Sumitomo Chem Co Ltd | α−アルミナ |
JP3744010B2 (ja) * | 1993-06-30 | 2006-02-08 | 住友化学株式会社 | α−アルミナ粉末の製造方法 |
JP3937494B2 (ja) * | 1997-02-24 | 2007-06-27 | 住友化学株式会社 | アルミナ充填樹脂またはゴム組成物 |
JP3766008B2 (ja) * | 2000-11-30 | 2006-04-12 | 株式会社リコー | 電子写真感光体、その製造方法、電子写真方法、画像形成装置及び画像形成装置用プロセスカートリッジ |
JP5103700B2 (ja) * | 2001-06-26 | 2012-12-19 | 住友化学株式会社 | 低ソーダアルミナの製造方法 |
JP2003201116A (ja) * | 2001-10-10 | 2003-07-15 | Showa Denko Kk | アルミナ粒、アルミナ粒の製造方法、アルミナ粒を含む組成物 |
JP2005022963A (ja) * | 2003-06-12 | 2005-01-27 | Showa Denko Kk | アルミナ粒の製造方法及び組成物 |
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WO2008062735A1 (en) | 2008-05-29 |
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