Titanium-containing perovskite composite oxide particle, production process thereof and capacitor

Abstract

A titanium-containing perovskite composite oxide particle represented by the compositional formula: A(TixB(1−x))yO3 (provided that x and y each denoting a compositional ratio are 0≦x≦1 and 0.98≦y≦1.02, A is at least one or more element selected from Ca, Sr, Ba, Pb and Mg, and B is at least one or more element selected from Hf and Zr), wherein the specific surface area is from 1 to 100 m2/g, the average primary particle diameter D1 defined by formula (I) is from 10 to 1,000 nm, and the ratio D2/D1 of D1 to the average secondary particle diameter D2 is from 1 to 10: D1=6/ρS  (I) (wherein ρ is a density of the particle and S is a specific surface area).

Dependencies are inferred from the claim text.