Divalent cation perovskite-type cpds. with controlled particle size

摘要

Divalent cation perovskite-type cpds. are produced by introducing at least one of the divalent cation hydroxides or oxides Ba(OH)2, Sr(OH)2, Ca(OH)2, PbO or Pb(OH)2 into a slurry of at least one of the hydrous tetravalent oxides TiO2, SnO2, ZrO2 or HfO2 at a temp. sufficient to effect formation of the particular divalent cation perovzkite based co-form. The invention relates particularly to barium titanate and barium titanate compsns..