Effect of sintering temperature on phase transformation and energy storage properties of 0.95NaNbO₃-0.05Bi(Zn_0.5Zr_0.5)O_{3 ceramics}

Dielectric materials with excellent energy storage performance are crucial to the development of renewable energy. In this work, we prepared 0.95NaNbO(3)-0.05Bi(Zn0.5Zr0.5)O-3 (0.95NN-0.05BZZ) ceramics using solid state sintering and investigated the effect of sintering temperature on phase structure. We find that the phase transformation of ceramics occurs with the change of sintering temperature. The cubic phase (Pm-3m) and the antiferroelectric phase (Pbma) coexist at 1150 degrees C, the ferroelectric phase (P21ma) appears at 1200 degrees C and its phase proportion decreases with the sintering temperature increasing from 1200 degrees C to 1280 degrees C. Finally, we achieve the high recoverable energy storage density (W-rec) 0.74 J/cm(3) and efficiency (eta) 71% (at 140 kV/cm) at 1150 degrees C.