To provide multiple oxide fine particles which have extremely low photocatalytic activity and from which a transparent composition having excellent optical characteristics, particularly excellent transparency and high refractive index and wavelength dispersibility can be obtained by dispersing the particles into a transparent resin, an organic solvent or the like, and to provide the transparent composition and a transparent resin composition using the same.
The multiple oxide fine particles contain Ti, one or more kinds of metal elements selected from the element group L comprising Sb and Bi, and one or more kinds of metal elements selected from the element group M comprising Al, Zr, Zn, Sn, Ca and Mg. The molar ratio of the element group L to the metal elements contained in the particles: [L]/[Ti+L+M] is within a range of 0.01-0.2, and the molar ratio of the total of element groups L and M to the metal elements contained in the particles: [L+M]/[Ti+L+M] is within a range of 0.01-0.5.
COPYRIGHT: (C)2007,JPO&INPIT
TANAKA TORU
YAMASHITA YUKIHIKO
YAMASHITA TAKESHI
YOSHII TAKAO
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu