| 摘要 |
PURPOSE: Provided is a method for producing an alpha-alumina powder comprising a step of calcining an aluminum salt in the presence of a seed crystal at 600 to 890 deg.C. CONSTITUTION: The method comprises a step of mixing aluminum salt with seed crystal; and a step of calcining the produced mixture at 600 to 890 deg.C, wherein the aluminum salt is one or more selected from the group consisting of inorganic aluminum salt, hydrate of the inorganic aluminum salt, organic aluminum salt and hydrate of the organic aluminum salt, wherein the inorganic aluminum salt is one or more selected from the group consisting of aluminum nitrate, aluminum sulfate, ammonium aluminum sulfate and ammonium aluminum carbonate hydroxide, wherein the organic aluminum salt is one or more selected from the group consisting of aluminum oxalate, aluminum acetate, aluminum stearate, aluminum lactate and aluminum laurate, wherein the seed crystal is one or more selected from the group consisting of α-alumina, diaspore, iron oxide, chromium oxide and titanium oxide, and wherein the seed crystal has 12 m¬2/g or more of BET specific surface area.
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