Structural and Dielectric Properties of XBaZr0.2Ti0.8O3-(1-x)BiFeO3 Solid Solution Ceramics

xBaZr_0.2Ti_0.8O₃-(1-x)BiFeO₃ (x=0, 0.3, 0.5, 0.7) solid solution ceramics were prepared by conventional solid-state reaction method. The crystal structure and dielectric properties of xBaZr_0.2Ti_0.8O₃-(1-x)BiFeO₃ ceramics have been investigated. The result indicates that the crystal structure of solid solution ceramics changes from rhobohedral to pseudocubic structure with the increase of barium zirconate titanate content. The room temperature dielectric constant of all samples decreases with the increasing of frequency. When the temperature is in the range of 30^oC~150^oC, the dielectric constant of all samples increases as temperature rises. In the same temperature range, the dielectric loss of BiFeO₃ ceramics increases with the rise of temperature and the dielectric loss of xBaZr_0.2Ti_0.8O₃-(1-x)BiFeO₃ (x=0.3~0.7) changes a little. The addition of barium zirconate titanate leads to the decrease of dielectric loss and leakage current for BiFeO₃ ceramics.