发明名称 |
ALUMINA POWDER, PROCESS FOR PRODUCING THE SAME AND POLISHING COMPOSITION |
摘要 |
<p>Production of an alumina powder characterized by having a single or multiple crystal structure selected from the group consisting of gamma, delta and theta-forms, a primary particle size of 10 to 50 nm, a mean secondary particle size of 100 to 500 nm, and a granular primary particle shape, or an alumina powder characterized by having an a-form crystal structure, a primary particle size of 60 to 150 nm, a mean secondary particle size of 200 to 500 nm, and a granular primary particle shape, using as a raw material an alumina hydrate comprising rectangular plate-like primary particles having a boehmite structure and having a length of one side of 10 to 50 nm; and preparation of a polishing composition comprising the alumina powder, water and a polishing accelerator.</p> |
申请公布号 |
EP1044163(A1) |
申请公布日期 |
2000.10.18 |
申请号 |
EP19990900038 |
申请日期 |
1999.01.05 |
申请人 |
NISSAN CHEMICAL INDUSTRIES, LTD. |
发明人 |
KASAI, TOSHIO;EMA, KIYOMI;OTA, ISAO;NISHIMURA, TOHRU |
分类号 |
C01F7/02;C01F7/44;C09G1/02;C09K3/14;(IPC1-7):C01F7/02;C09G1/04 |
主分类号 |
C01F7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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