The present invention provides a method of producing an α-alumina particle. The method of producing an α-alumina particle comprises steps of: (1) heating a mixture containing an amorphous alumina and a pyrolyzable salt at temperature of not less than the temperature at which the pyrolyzable salt is decomposed, and less than the temperature at which the amorphous alumina transforms to α-alumina; and (2) calcining the resultant under a partial pressure of water vapor of about 600 Pa or less.
本发明提供了一种生产α-氧化铝颗粒的方法。该生产α-氧化铝颗粒的方法包括以下步骤:(1)将含有非晶态氧化铝和可热解盐的混合物加热至不低于可热解盐分解温度且低于非晶态氧化铝转变为α-氧化铝的温度;(2)在
水蒸气分压约为600帕或更低的条件下对所得产物进行煅烧。