A perovskite titanium-containing composite oxide particle having a composition
represented by general formula (I), where the specific surface area is about 10
to about 200 m2/g, the specific surface area diameter D1
of primary particles defined by formula (II) is about 10 to about 100 nm, and a
D2/D1 ratio of the average particle size D2 of
secondary particles to D1 is about 1 to about 10:
- wherein M is at least one of Ca, Sr, Ba, Pb, or Mg,
- wherein 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.
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