Dielectric and temperature stable energy storage properties of 0.88BaTiO3-0.12Bi(Mg1/2Ti1/2)O3 bulk ceramics

The 0.88BaTiO(3)-0.12Bi(Mg1/2Ti1/2)O-3 ceramics were prepared via the solid state reaction route. The temperature dependence of permittivity in 0.88BaTiO(3)-0.12Bi(Mg1/2Ti1/2)O-3 (0.88BT-0.12BMT) ceramics shows relaxor-like behavior and weak temperature-dependence over a temperature range from 50 degrees C to 100 degrees C at 100 Hz. The polarization-electric field hysteresis (P-E) loops display a linear behavior at low fields, and slight saturated nonlinear behaviors at higher fields. It can be inferred from the polarization behavior at high fields that a field-induced phase transition from relaxor state to ferroelectric state can be detected. Energy storage performance at different temperatures was also studied. The maximum energy storage density of 1.81 J/cm(2) was obtained at room temperature. And, a temperature stable energy storage property of the 0.88BT-0.12BMT over a temperature range from 50 degrees C to 120 degrees C suggests its potential application in energy storage capacitors. (C) 2015 Elsevier B.V. All rights reserved.