Sintering temperature dependence of dielectric properties and energy-storage properties in (Ba,Zr)TiO3 ceramics

BaZr0.1Ti0.9O3 ceramics are prepared via the conventional solid state reaction method. The Zr4+ ions have diffused into the BaTiO3 lattices to form a homogenous solid solution. We investigate the dielectric properties and energy storage density of BaZr0.1Ti0.9O3 ceramics at different sintering temperature. The temperature dependence of dielectric constant of BaZr0.1Ti0.9O3 ceramics illustrates the obvious relaxor phase transition characteristics. The polarization hysteresis loops P-E of ceramics sintered at 1260-1300 degrees C show slimmer comparable to that of ceramics sintered at 1240 degrees C, resulting in high energy storage density. Excellent dielectric properties and energy storage density are achieved in the BaZr0.1Ti0.9O3 ceramics sintered at 1260 degrees C for 2 h: epsilon(r) = 2998, tan delta = 0.007 and J = 0.5 J cm(-3).