Abstract
Silica and titania were coated on barium sulfate and magnetite by hydrolysis of metal alkoxides. The reaction of tetraethoxysilane (TEOS) and titaniumtetraisopropoxide (TTIP) were independent on the seed particles because the over-all reaction constants of TEOS and TTIP were comparable with those obtained using monodispersed silica seed particles. The characterization of composite particles suggested the possibility of silica and titania coating on inorganic particles by the hydrolysis of metal alkoxide. The uniform coating on the inorganic particles was depended on the types of dispersants and coating conditions.
