Method for Producing Aluminum Nitride Powder
AssigneeTokuyama Corporation
InventorsYutaka Fukunaga, Yukihiro Kanechika
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Abstract
A method for producing an aluminum nitride powder includes mixing an alumina powder having an average particle diameter of not more than 5 μm; an eutectic melting agent; and a carbon powder are mixed to obtain a mixture thereof, and reductively nitriding the mixture by firing at a higher temperature than a melting point of the eutectic melting agent, while maintaining a nitrogen ratio within a range of 60 to 85 vol % in an atmosphere of mixed gases of nitrogen and carbon monoxide until a nitriding ratio of the alumina powder reaches at least 50%.
Claims5
A method for producing an aluminum nitride powder, comprising reductively nitriding an alumina powder, wherein:
- the alumina powder having an average particle diameter of not more than 5 μm, an eutectic melting agent, and a carbon powder are mixed to obtain a mixture thereof, and
- the mixture is reductively nitrided by firing at a higher temperature than a melting point of the eutectic melting agent, while maintaining a nitrogen ratio within a range of 60 to 85 vol % in an atmosphere of mixed gases of nitrogen and carbon monoxide until a nitriding ratio of the alumina powder reaches at least 50%.
A method for producing an aluminum nitride powder, comprising:
- mixing alumina powder having an average particle diameter of not more than 5 μm, an eutectic melting agent, and a carbon powder to obtain a mixture thereof, and
- reductively nitriding the mixture by firing at a higher temperature than a melting point of the eutectic melting agent, while maintaining a nitrogen ratio within a range of 60 to 85 vol % in an atmosphere of mixed gases of nitrogen and carbon monoxide until a nitriding ratio of the alumina powder reaches at least 50%.
Dependencies are inferred from the claim text.