Synthesis and electrical properties of lead free (Bi0.5K0.5)TiO3–BaTiO3–Bi(Zn0.5Ti0.5)O3 ceramics

Lead free ferroelectric materials with high Curie temperature in (x)[(Bi0.5K0.5)TiO3]−(1 − x)[0.5Bi(Zn0.5Ti0.5)O3–0.5BaTiO3] or (x)BKT–(1 − x)[BZT–BT] ternary system, where x = 0.4, 0.5, 0.6 and 0.8, were synthesized. The single phase perovskite for all ceramics were formed at 900 °C for 6 h in air. The ceramic compositions with x = 0.5 and 0.6 exhibited the dielectric properties with relaxor-like phase transition behavior, while the ceramic with x = 0.8 showed the dielectric behavior of normal ferroelectric materials. From room temperature P–E measurement, the maximum remnant polarization (Pr of 2.75 μC/cm2) and coercive field (Ec of 12.41 kV/cm) were obtained in the composition with x = 0.6. In addition, the TC, Pr and Ec were found trend to increase with increasing BKT content.