Preparation of silicon nitride powder
US4122155A · kind A · utility
23Cited by
3References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 3, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Jan 3, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A gas mixture of silane and ammonia is heated at temperatures between about 600.degree. C and 1000.degree. C producing an amorphous powdery reaction product which, when heated at a calcination temperature of at least 1100.degree. C yields ultrafine Si.sub.3 N.sub.4 powder of high purity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.