Process for preparing ultrafine aluminum nitride powder
US5219804A · kind A · utility
11Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jan 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Rapidly heat powdered aluminum, an admixture of powdered aluminum and a compatible solid material, a powdered admixture of alumina and carbon, or aluminum nitride powder having a surface area lower than desired in the presence of a source of nitrogen at a temperature of 2473 to 3073K to produce aluminum nitride, then promptly quench the aluminum nitride product. The product has a surface area of greater than 10 m.sup.2 /g, preferably greater than 15 m.sup.2 /g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.