Phase transition and energy storage properties of BaTiO3-modified Bi-0.5(Na0.8K0.2)(0.5)TiO3 ceramics

摘要

Perovskite type (1-x)Bi-0.5(Na0.8K0.2)(0.5)TiO3-xBaTiO(3) (x = 0.0-0.05) ceramics were prepared by conventional solid state reaction method. X-ray diffraction revealed a phase transition from rhombohedral and tetragonal mixed phase to tetragonal phase at x = 0.05. The signature of lattice disorder generated due of differences in ionic radius of cations at A-site is analyses using Raman spectra. The broadening of dielectric peak and its frequency dependence behaviour near T-d is considered as relaxor behaviour of these ceramics. Addition of BT, reduces remnant polarization and hysteresis loss is suggested the possibility of energy storage ability of these ceramics.