Method of making moisture resistant aluminum nitride powder and powder produced thereby
US5234712A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jun 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for making a moisture-resistant aluminum nitride-containing powder which includes (a) coating a layer of silicate onto aluminum nitride-containing powder having aluminum nitride on at least a portion of its surface and (b) heat-treating the coated aluminum nitride-containing powder at a temperature of from about 350.degree. to about 1000.degree. C. for a period of time sufficient to cause the silicate to react with the surface aluminum nitride thereby forming a layer of Si-Al-O-N bonded to the surface aluminum nitride. The silicate has alkyl or alkoxyalkyl radicals attached thereto. The method yields a moisture- resistant aluminum nitride-containing powder having a layer of Si-Al-O-N reaction-bonded to the surface aluminum nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.