Preparation of 0.95Bi _1/2 Na _1/2 TiO ₃ ·0.05BaTiO ₃ Ceramics by an Aqueous Citrate‐Gel Route

Abstract

This report details development of a route to solution‐derived (1− x )Bi 1/2 Na 1/2 TiO 3 · x BaTiO 3 powders. The method developed was the citrate‐gel method—an evaporative, aqueous technique. When applied to 0.95Bi 1/2 Na 1/2 TiO 3 ·0.05BaTiO 3 (BNBT‐5), the method produced perovskite phase powders that readily densified in the temperature range of 1000°C. The grain size of the sintered materials was on the order of 1 μm, and the weak‐field dielectric properties at 1 MHz were similar to those reported for conventionally prepared materials sintered at higher temperatures (e.g., 1200°C).