Hydridosiloxanes as precursors to ceramic products
US5635250A · kind A · utility
38Cited by
26References
55Claims
0Family size
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Key dates
| Filing date | May 9, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | May 9, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is provided for preparing ceramic precursors from hydridosiloxane starting materials and then pyrolyzing these precursors to give rise to silicious ceramic materials. Si--H bonds present in the hydridosiloxane starting materials are catalytically activated, and the activated hydrogen atoms may then be replaced with nonhydrogen substituents. These preceramic materials are pyrolyzed in a selected atmosphere to give the desired ceramic product. Ceramic products which may be prepared by this technique include silica, silicon oxynitride, silicon carbide, metal silicates, and mullite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.