DISPERSION OF SURFACE-TREATED SILICA-CONTAINING INORGANIC OXIDE PARTICLES AND METHOD FOR PRODUCING SAME

[Problem] To provide a dispersion of inorganic oxide particles exhibiting a high dispersion stability even at a high temperature or a high salt content.[Solution] A dispersion comprising, as a dispersoid, silane-bonded inorganic oxide particles having surfaces modified with a hydrolyzable silane, and a liquid medium as a dispersion medium, wherein the dispersion medium contains a hydrolysate of the hydrolyzable silane; the ratio of (the number of moles of silicon atoms of the hydrolysate of the hydrolyzable silane in the dispersion medium)/(the number of moles of silicon atoms of the silane bonded to the surfaces of the inorganic oxide particles) is 0.2 to 30; and Q4 is greater than that before the surface modification with the silane, wherein Q4 corresponds to the case where the number of bridging oxygen atoms between silicon atoms of the silica particles is 4/2 per one silicon atom as determined by Si-NMR observation. The inorganic oxide particles have an average particle diameter of 5 nm to 100 nm and are particles of silica and at least one inorganic oxide selected from the group consisting of alumina, tin oxide, zirconium oxide, titanium oxide, and antimony oxide. The present invention involves particles of a single metal oxide, a composite metal oxide, or a composite oxide having a core-shell structure.