| abstract |
According to the present invention, a process is provided for producing crystalline ceric oxide particles having a particle diameter of 0.005 to 5 μm, which comprises the steps of reacting a cerium (III) salt with an alkaline substance in an (OH)/(Ce 3+ ) molar ratio of 3 to 30 in an aqueous medium in an inert gas atmosphere to produce a suspension of cerium (III) hydroxide, and blowing oxygen or a gas containing oxygen into the suspension at a temperature of 10 to 95° C. and at an atmospheric pressure. |