PURPOSE: To simply and easily improve dispersibility, packing ratio, dielectric property and piezoelectric property by pulverizing a perovskite type compound with a compacting pulverizer.
CONSTITUTION: A water based suspension (C) is obtained by mixing a hydrated oxide (A) of one or more kind of an element selected from Ba, Pb, Sr, Mg and Ca with a hydrated oxide (B) of one or more kind of an element selected from Ti, Zr, Hf and Sn having ≥50m2/g specific surface area so as to be (1.1-2.0):1 in mol ratio of component (A):component (B). Next, the perovskite type compound (D) is obtained by hydrothermal treating the component (C) at 100-250°C, classifying the obtained product and drying. Next, the component (D) is pulverized with the compacting pulverizer. If necessary, the component (D) is calcined at 100-700°C before or after pulverizing to produce the perovskite type compound powder.
WATANABE MITSURU
MORIBE TERUKAZU
