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US 4,758,539 AGranted
Process for producing ceramic nitrides and carbonitrides and their precursors
AssigneeThe United States of America as represented by the United States Department of Energy
InventorsGilbert M. Brown, Leon Maya
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Abstract
A process for preparing ceramic nitrides and carbonitrides in the form of very pure, fine particulate powder. Appropriate precursor is prepared by reacting a transition metal alkylamide with ammonia to produce a mixture of metal amide and metal imide in the form of an easily pyrolyzable precipitate.
Claims15
A process for preparing a ceramic precursor comprising the steps:
- (A) reacting a transition metal alkylamide with ammonia to produce a precipitate;
- (B) isolating said precipitate.
A process for preparing ceramics comprising
- reacting a transition metal alkylamide with ammonia to produce a precipitate;
- isolating said precipitate;
- pyrolyzing said precipitate in a nonoxidizing environment.
Dependencies are inferred from the claim text.