PEROVSKITE TYPE COMPOSITE OXIDE CONTAINING TITANIUM

Title:

PEROVSKITE TYPE COMPOSITE OXIDE CONTAINING TITANIUM

Document Type and Number:

WIPO Patent Application WO/2000/035811

Kind Code:

A1

Abstract:

A perovskite type composite oxide containing titanium which has a composition represented by the general formula (I): M(TiO¿3?) wherein M is at least one element of Ca, Sr, Ba, Pb and Mg, a nd has a specific surface area of 10 to 200 m?2¿/g, a specific surface area diameter of primary particles D¿1?, being defined by the formula (II): D¿1? = 6/$g(r)S wherein $g(r) is a density of a particle and S is a specific surface area of the particle, of 10 to 100 nm and a ratio of an average diameter of second particles D¿2? to D¿1?, D¿2?/D¿1?, of 1 to 10. The perovskite type composite oxide has a small particle diameter and excellent dispersibility, and thus is greatly suitable for use in a functional material such as a dielectric material or a piezo-electric material, a memory, a photocatalyst and the like.

Inventors:

OHMORI MASAHIRO (JP)
KOTERA AKIHIKO (JP)

Application Number:

PCT/JP1999/006876

Publication Date:

June 22, 2000

Filing Date:

December 08, 1999

Export Citation:

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Assignee:

SHOWA DENKO KK (JP)
OHMORI MASAHIRO (JP)
KOTERA AKIHIKO (JP)

International Classes:

B01J13/00; B01J21/06; B01J23/00; B01J35/00; C01G23/00; (IPC1-7): C01G23/053

Foreign References:

JPH07277710A	1995-10-24
JPH07291607A	1995-11-07
JPH06305729A	1994-11-01
JPH11228139A	1999-08-24
JPH0769635A	1995-03-14
JPH10298769A	1998-11-10
JPH10286537A	1998-10-27

Other References: