Porous free standing pyrolytic boron nitride articles
US4402925A · kind A · utility
4Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1981 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Sep 28, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B38/0029
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sponge-like free-standing pyrolytic boron article is made by reacting ammonia and gaseous boron halide diluted with an non-oxidizing gas to deposit pyrolitic boron nitride on a porous substrate such as open-pored vitreous carbon under a vacuum and then removing the substrate as by oxidation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.