Method for producing alkali metal nitride or alkaline earth metal nitride
AssigneeTaiheiyo Cement Corporation
InventorsShoji Suzuki, Kazuhiko Tokoyoda, Tsutomu Suzuki
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Abstract
There is provided a method for efficiently producing a high-purity alkali metal nitride or alkaline earth metal nitride by simple processes. Specifically provided is a method for producing an alkali metal nitride, an alkaline earth metal nitride, or a composite thereof, the method including thermally decomposing one or more alkali metal amides or alkaline earth metal amides.
Claims14
A method for producing a metal nitride, the method comprising:
- (i) thermally decomposing a mixture of at least two alkali metal amides at a temperature of 300° C. to 700° C. for 1 hour to 24 hours under vacuum or under an inert gas to form a composite of at least two alkali metal nitrides;
- (ii) thermally decomposing a mixture of at least two alkaline earth metal amides at a temperature of 800° C. to 1200° C. for 1 hour to 24 hours under vacuum or under an inert gas to form a composite of at least two alkaline earth metal nitrides.
A method for producing a metal nitride, the method comprising:
- (i) thermally decomposing an alkali metal amide at a temperature of 300° C. to 700° C. for 1 hour to 24 hours under vacuum or under an inert gas to form an alkali metal nitride;
- (ii) thermally decomposing an alkaline earth metal amide at a temperature of 800° C. to 1200° C. for 1 hour to 24 hours under vacuum or under an inert gas to form an alkaline earth metal nitride;
- or
- (iii) thermally decomposing a mixture of at least two alkaline earth metal amides at a temperature of 800° C. to 1200° C. for 1 hour to 24 hours under vacuum or under an inert gas to form a composite of at least two alkaline earth metal nitrides,
- wherein the alkali metal amide, the alkaline earth metal amide, or both, is obtained by reacting at least one of an alkali metal and an alkaline earth metal with ammonia to form a liquid phase thereof.
A method for producing a metal nitride, the method comprising thermally decomposing an alkaline earth metal amide at a temperature of 800° C. to 1200° C. for 1 hour to 24 hours under vacuum or under an inert gas to form an alkaline earth metal nitride.
Dependencies are inferred from the claim text.