PEROVSKITE TYPE COMPOSITE OXIDE CONTAINING TITANIUM

摘要

A perovskite-type titanium-containing mixed oxide particle comprising a composition represented by formula (I) and having a specific surface area ranging from 10 to 200 m<2>/g, the primary particles thereof having a specific surface area diameter D1 defined by formula (II) ranging from 10 to 100 nm and the ratio D2/D1 between D1 and the average particle size D2 of the secondary particles being from 1 to 10: M(TiO3) (wherein M is at least one selected from Ca, Sr, Ba, Pb and Mg); <MATH> (wherein rho is the particle density and S is the specific surface area of the particles); The perovskite-type titanium-containing mixed oxide particles of the present invention have a small particle size and excellent dispersibility and are most suitable for applications to functional materials such as dielectric materials and piezoelectric materials and to memory media and photocatalyst. <IMAGE>