IMF2017

Lead free ferroelectric ceramic (1-x) Ba(Zr_0.2Ti_0.8)O₃-x(Ba_0.7Ca_0.3)TiO₃ (BZT-BCT) of great interest in research community due to their triple point type morphotropic phase boundary(MPB) and high d₃₃ value comparable with PZT. In this work we have investigated the influence of calcination temperature on ferroelectric property of BCT-BZT. We prepared the sample by conventional solid state reaction and calcined at different temperature ranging from 1200 ^oC to 1500 ^oC. Ferroelectric measurement reveals, solid solutions calcined at lower temperature gives rise to double hysteresis behavior whereas solid solution calcined at higher temperature displays typical ferroelectric hysteresis loop. The temperature dependent dielectric measurement shows that the system with low calcination temperature samples has lower Curie temperature compared to that of FE samples. The dielectric constant shows continuity in Curie temperature and relatively not high value compare to FE sample. The structure, microstructure and dielectric analysis of these compounds are presented in this work.