Preparing 0.15BaTiO₃–0.85(Bi_0.5Na_0.5)TiO₃ ceramics using spark plasma sintering

抄録

Sodium bismuth titanate [(0.15BaTiO₃–0.85(Bi_0.5Na_0.5)TiO₃], hereafter 0.15BT–0.85BNT, powder was prepared using hydrothermal synthesis. The particle size was approximately 0.1 µm. In addition, 0.15BT–0.85BNT ceramics were fabricated using the spark plasma sintering technique. Sintering was performed at 1273 K for 10 min. The relative density, grain size, and piezoelectric constant of the obtained ceramics were approximately 97%, 0.25 µm, and 12 pC/N, respectively. To our knowledge, this would be the first attempt to synthesize 0.15BT–0.85BNT piezoceramics featuring submicron-sized grains.