| 摘要 |
The present invention provides a perovskite titanium-containing composite oxide fine particle represented by the formula: (A1<SUB>X</SUB>A2<SUB>(1-X)</SUB>)<SUB>Y</SUB>TiO<SUB>3±delta</SUB> (wherein 0<=X<=1, 0.98<=Y<=1.02, 0<=delta<=0.05, A1 and A2 each is an atom selected from a group consisting of Ca, Sr, Ba, Pb and Mg and are different from each other), wherein the specific surface area is from 1 to 100 m<SUP>2</SUP>/g and the D2/D1 value is from 1 to 10.
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