Method for production of inorganic minute globular particles.

摘要

A method for the production of inorganic minute globular particles, which comprises forming a W/O type sol emulsion by mixing at least one metal oxide-containing sol selected from the group consisting of (a) metal oxide sols and (b) mixed sols containing said metal oxide sols and an inorganic compound, an alkoxide, or a sol of at least one other element with an organic solvent insoluble or sparingly soluble in water in the presence of a surfactant; mixing said emulsion with a basic substance or an electrolyte thereby converting the sol forming the water layer in said emulsion into gel thereby obtaining globular gel particles; and subsequently heating the globular gel particles thereby expelling from the system the water in the globular gel particles in the form of a mixture thereof with the organic solvent.