Silicon nitride sintered bodies and a method for producing the same
US4535063A · kind A · utility
15Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1983 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Jun 7, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/584
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Silicon nitride sintered bodies having a high density, high mechanical strength and high fracture toughness, contain specific amounts of oxides or oxynitrides of Sr, Mg, a rare earth element and Zr respectively and the remainder being Si.sub.3 N.sub.4, are produced by shaping a raw batch material containing compounds of each of Sr, Mg, a rare earth element and Zr in given amounts, wherein Zr is added by abrasion of the grinding media and the mixture is pressurelessly sintered in nitrogen or an inert gas atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.