发明名称 |
Process for obtaining alpha-alumina powders. |
摘要 |
<p>A process for obtaining alpha-alumina in powder form having a particle median size distribution D50 from 0.1 to 1 micron and having coarse particles larger than 3 microns being less than 2% comprises subjecting solid powder of hydrated Al2O3, or hydrated aluminium chloride or sulphate, to a calcination treatment to transform it to alpha-phase alumina and to obtain a powder having a surface area from 2 to 12 m<2>/g; and grinding the powder.</p> |
申请公布号 |
EP0279672(A1) |
申请公布日期 |
1988.08.24 |
申请号 |
EP19880301370 |
申请日期 |
1988.02.18 |
申请人 |
KERAMONT RESEARCH CORPORATION |
发明人 |
LOUTFY, RAOUF O.;SEPULVEDA, JUAN L.;WITHERS, JAMES C. |
分类号 |
C01F7/02;C01F7/30;C01F7/32;C01F7/44;C04B35/111;(IPC1-7):C04B35/10 |
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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