Solid‐State Preparation of BaTiO ₃ ‐Based Dielectrics, Using Ultrafine Raw Materials

Abstract

BaTiO 3 and Ba(Ti,Zr)O 3 dielectric powders have been prepared from submicrometer BaCO 3 , TiO 2 , and ZrO 2 . By use of submicrometer BaCO 3 the intermediate formation of Ba 2 TiO 4 second phase can be widely suppressed. Monophase perovskites of BaTiO 3 were already formed at 900°C and Ba(Ti,Zr)O 3 at 1050°C. Aggregates of very small subgrains could be easily disintegrated to particle sizes <0.5 μm.