| 摘要 |
A perovskite titanium-containing composite oxide particle has a composition represented by general formula (I), wherein the specific surface area is about 10 to about 200 m<SUP>2</SUP>/g, the specific surface area diameter D<SUB>1 </SUB>of the primary particles as defined by formula (II) is about 10 to about 100 nm, and the ratio D<SUB>2</SUB>/D<SUB>1 </SUB>of the average particle size D<SUB>2 </SUB>of the secondary particles to D<SUB>1 </SUB>is about 1 to about 10: <?in-line-formulae description="In-line Formulae" end="lead"?>M(TiO<SUB>3</SUB>) (I) <?in-line-formulae description="In-line Formulae" end="tail"?> (wherein M is at least one of Ca, Sr, Ba, Pb, or Mg) <?in-line-formulae description="In-line Formulae" end="lead"?>D<SUB>1</SUB>=6/rhoS (II) <?in-line-formulae description="In-line Formulae" end="tail"?> (wherein rho is the density of the particles, and S is the specific surface area of the particles.) The perovskite titanium-containing composite oxide particle of the present invention shows a small particle size and excellent dispersion properties, so that the particle is suitable for the application to functional materials such as a dielectric material and a piezoelectric material, a memory, and a photocatalyst. |
