Enhanced Energy Storage Properties of La and Zr Modified Bi0.5(Na0.82K0.18)0.5TiO3 Based Ceramics

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The [Bi0.5(Na0.82K0.18)0.5]1-xLaxTi1-yZryO3 (BNKLZT) energy storage ceramics were prepared by conventional solid-state reaction method. Structure, surface morphology, dielectric, ferroelectric and energy storage properties of the BNKLBZT ceramics were investigated. The BNKLZT ceramics showed perovskite, homogeneous and dense structure. Grain size was coarsened by Zr doping, and refined by La doping. Low remnant polarization (Pr) and coercive field (Ec), slim P-E loops were obtained by introducing La and Zr dopants. The optimum energy storage property was obtained for the composition of La=0.03 and Zr=0.03, with energy storage density of 0.84 J/cm3 at 80 kV/cm.

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