Preparation of BaO-TiO₂-ZrO₂ system compounds by a floating zone method.

Abstract

BaO-TiO₂-ZrO₂ system compounds were prepared by a floating zone method. Two phase mixtures of BaTiO₃ and BaZrO₃ were obtained in the full range of BaTiO₃-BaZrO₃ system. The maximum permittivity decreased with increasing BaZrO₃ content. BaTi₂O₅ was prepared in a single crystal. The permittivity perpendicular to (002) plane was about 70. In a TiO₂ rich region, BaTi₂O₅-Ba₆Ti₁₇O₄₀ eutectic composites were prepared. The eutectic composites consisted of BaTi₂O₅ matrix and rod-shaped Ba₆Ti₁₇O₄₀. The (020) plane of BaTi₂O₅ matrix was perpendicular to the growth direction.