Abstract: 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 m2/g, the specific surface area diameter D1 of the primary particles as defined by formula (II) is about 10 to about 100 nm, and the ratio D2/D1 of the average particle size D2 of the secondary particles to D1 is about 1 to about 10: M(TiO3)??(I) (wherein M is at least one of Ca, Sr, Ba, Pb, or Mg) D1=6/?S??(II) (wherein ? 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.

Abstract: 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: M(TiO3)??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg, D1=6/?S??(II) 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.

Abstract: 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: M(TiO3) ??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg, D1=6/?S ??(II) 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.

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 m2/g, the specific surface area diameter D1 of the 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: M(TiO3)??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg D1=6/?S??(II) 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.

Abstract: 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: M(TiO3)??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg, D1=6/?S??(II) 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.

Abstract: 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: M(TiO3)??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg, D1=6/?S??(II) 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.

Abstract: A composite structure having a photocatalytic function and can be used for deodorization and wastewater treatment, comprising a foamed or porous substrate having apparent specific gravity of 0.9 to 0.01 and finely divided titanium oxide particles having a photocatalytic function which are adhered onto the surface of the foamed or porous substrate. Gas such as air having offensive odor or wastewater is allowed to be in contact with the composite structure having a photocatalytic function, whereby smelly or harmful substances contained in the gas or wastewater are decomposed.

Abstract: 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 m2/g, the specific surface area diameter D1 of the primary particles as defined by formula (II) is about 10 to about 100 nm, and the ratio D2/D1 of the average particle size D2 of the secondary particles to D1 is about 1 to about 10:

Abstract: 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 m2/g, the specific surface area diameter D1 of the primary particles as defined by formula (II) is about 10 to about 100 nm, and the ratio D2/D1 of the average particle size D2 of the secondary particles to D1 is about 1 to about 10: