Polymetalosilazane, process of producing same, silicon nitride based ceramic, and process of preparing same
US5436398A · kind A · utility
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2References
6Claims
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Key dates
| Filing date | Apr 6, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Apr 6, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A preceramic polymetalosilazane substantially free of Si-O groups is produced by reacting a polysilazane with a metal alkoxide in the presence of an alkylsilazane or alkylsilane. The preceramic polymer gives a high strength and heat resistant ceramic body which remains amorphous when calcined at 1,600.degree. C. for 10 hours in the atmosphere of nitrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.