Process for preparation of alumina powder and precursor thereof

摘要

There is provided a process for the preparation of a alumina precursor powder from aluminum hydroxide powder obtained by hydrolysis of aluminum alkoxide which precursor enables to provide alumina powder with a high volumetric efficiency. Such process comprises mixing aluminum hydroxide powder obtained by hydrolysis of an aluminum alkoxide with the following aqueous medium so as to obtain an aluminum hydroxide mixed slurry and then drying the aluminum hydroxide mixed slurry: aqueous medium: water or a medium mixture of water and a water-soluble alcohol wherein a water content in said medium mixture is not less than 15 parts by weight to 100 parts by weight of the medium mixture.