【発明の名称】無機酸化物粒子の製造方法

Japanese Patent JP2915224

B2

PURPOSE:To produce inorganic oxide particles having controlled particle diameter by hydrolyzing an organometallic compound while controlling the electrical conductivity of a reaction liquid composed of a hydrolysis catalyst, water, an electrolyte and a solvent at the start of the reaction. CONSTITUTION:A solvent such as methanol is incorporated with a hydrolysis catalyst such as ammonia water in an amount to get a water-content of 0.1-30wt.% and a catalyst content of 1-10wt.% based on the hydrolyzing object. An electrolyte substance such as NaOH is added to the obtained mixture at a liquid temperature of 0-60 deg.C to adjust the electrical conductivity to 0-10ms/cm at the start of the reaction. A methanol solution of a hydrolyzable organometallic compound expressed by the formula M(OR)m or MRn(OR)k-n [(m) is 1-4; (k) is 1-4; n