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US 7,351,394 B2Granted
Method for producing α-alumina powder
AssigneeSumitomo Chemical Company, Limited
InventorsHajime Maki, Yoshiaki Takeuchi
Life of this patent
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Abstract
A method for producing an α-alumina powder is described. The method for producing an α-alumina powder comprises a step of calcining an aluminum salt in the presence of a seed crystal at 600-890° C.
Claims8
A method for producing an α-alumina powder consisting essentially of steps of:
- mixing an aluminum salt with a seed crystal by a method in which the aluminum salt is added to a solvent to obtain a solution or slurry, the seed crystal is added to said solution or slurry, and the solvent is then removed, and
- calcining the resulting mixture at 600-890° C.
Dependencies are inferred from the claim text.