Silicon nitride sintered bodies and a method of manufacturing the same
US4801565A · kind A · utility
10Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Apr 7, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/584
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A silicon nitride sintered bodies are disclosed, which mainly consist of Si.sub.3 N.sub.4 and contains at least an oxide of a rare earth element and ZrO.sub.2. In the silicon nitride sintered bodies, a J phase solid solution is present in an intergranular phase. The silicon nitride sintered bodies are produced by steps of raw material-formulating, molding and firing. The J phase solution is precipitated in the intergranular phase by temperature-descending step or a reheating step after the firing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.