Silicon nitride sintered bodies
US5089449A · kind A · utility
5Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/584
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Silicon nitride sintered bodies including Si.sub.3 N.sub.4 and at least one element selected from Y.sub.2 O.sub.3, MgO, ZrO.sub.2. In the silicon nitride bodies, a J phase solid solution is present in an intergranular phase, which satisfies a relation of 0.65x.ltoreq.y.ltoreq.x+2 wherein y is an amount of J phase solid solution and x is an amount of Y.sub.2 O.sub.3 as an additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.