Silica-metal oxide composite particles and method of producing the same

摘要

Silica composite oxide particles comprising silica and a metal oxide other than silica, the content of the metal oxide other than silica being from 30 to 50 mol%, and a coefficient of variation in the particle diameter being not larger than 30%. The silica composite oxide particles contain metal oxides other than silica in an amount of not smaller than 30 mol%, which could not be produced thus far, and feature excellent spherical shape and excellent monodispersion property.