Method for producing aluminum nitride powder
US4780299A · kind A · utility
17Cited by
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10Claims
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Key dates
| Filing date | Nov 23, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Nov 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/61
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing an aluminum nitride powder of superior sinterability of which steps are providing an aqueous boehmite sol having a pH of 1.2 to 4.5, mixing a carbon source material to the sol and drying the mixture. The mixture is sintered in a non-oxidizing atmosphere containing nitrogen or in a nitrogen atmosphere and finally decarbonized to obtain an aluminum nitride powder. The carbon source material is preferably a mixture of an organic carbon source material and a solid carbon powder. A predetermined amount of alpha-alumina may be added to the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.