METHOD FOR PRODUCING METAL OXIDE SOL

摘要

It is an object to provide a method for producing stable alkaline metal oxide sols having a uniform particle size distribution. The method comprises the steps of: heating a metal compound at a temperature of 60°C to 110°C in an aqueous medium that contains a carbonate of quaternary ammonium; and carrying out hydrothermal processing at a temperature of 110°C to 250°C. The carbonate of quaternary ammonium is (NR 4 ) 2 CO 3 or NR 4 HCO 3 in which R represents a hydrocarbon group, or a mixture thereof. The metal compound is one, or two or more metal compounds selected from a group of compounds based on a metal having a valence that is bivalent, trivalent, or tetravalent.