Patent Number: 7,030,165

Title: Perovskite titanium-type composite oxide particle and production process thereof

Abstract: A perovskite titanium-containing composite oxide particle have a composition represented by general formula (I), where the specific surface area is about 10 to about 200 m.sup.2/g, the specific surface area diameter D.sub.1 of the primary particles defined by formula (II) is about 10 to about 100 nm, and a D.sub.2/D.sub.1 ratio of the average particle size D.sub.2 of secondary particles to D.sub.1 is about 1 to about 10: M(TiO.sub.3) (I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg D.sub.1=6/.rho.S (II) wherein .rho. is the density of the particles, and S is the specific surface area of the particles is disclosed. The present invention has a small particle size and excellent dispersion properties, so that the particle is suitable for application to functional materials.

Inventors: Ohmori; Masahiro (Chiba, JP), Kotera; Akihiko (Chiba, JP)

Assignee: Showa Denko Kabushiki Kaisha

International Classification: C01G 23/00 (20060101); C01F 11/00 (20060101); C01F 5/00 (20060101); C01G 21/00 (20060101)

Expiration Date: 4/18/02018