Method of preparing silicon carbide ceramic materials, and starting compositions for use with this method
US5877104A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Jul 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/571
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing ceramic materials and/or precursors thereof from polysilanes of formula (I): ##STR1## in which: n.gtoreq.1, x+y=1, with:0.3.ltoreq..times..ltoreq.1 and,preferably, 0.5.ltoreq.x.ltoreq.0.8, 0.ltoreq.y.ltoreq.0.7. Pyrolytic efficiency and the quality of the final ceramics may be increased by pyrolysis carefully selected polysilanes (I) in the presence of a catalytic amount of at least one boron compound and optionally in the presence of at least one unsaturated cross-linking agent, preferably a vinyl cross-linking agent. This method is useful for preparing ceramic articles such as fibres, films, binders and matrices for use, inter alia, in electronics, electro-optics, semiconductor technology and aeronautics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.