Process for the continuous production of high purity, ultra-fine, aluminum nitride powder by the carbo-nitridization of alumina
US5154907A · kind A · utility
6Cited by
7References
15Claims
0Family size
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Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/0053
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the manufacture of high purity, ultra-fine aluminum nitride powder by the carbo-nitridization of alumina. Agglomerates uniform in both size, chemical composition and porosity are formed containing a stoichiometric mixture of alumina and carbon with the addition of a small amount of catalyst. The agglomerates are furnaced in a controlled manner in a well-mixed reaction vessel to achieve a uniform and consistent level of conversion. Milling of the as-reacted agglomerates under a controlled atmosphere will produce high purity, micron sized aluminum nitride powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.