Enhanced energy storage and fast discharge properties of BaTiO3 based ceramics modified by Bi(Mg1/2Zr1/2)O3

Authors

Xuewen Jiang, Wuhan University of Technology
Hua Hao, Wuhan University of Technology
Shujun Zhang, University of WollongongFollow
Jiahao Lv, Wuhan University of Technology
Minghe Cao, Wuhan University of Technology
Zhonghua Yao, Wuhan University of Technology
Hanxing Liu, Wuhan University of Technology

RIS ID

131882

Publication Details

Jiang, X., Hao, H., Zhang, S., Lv, J., Cao, M., Yao, Z. & Liu, H. (2019). Enhanced energy storage and fast discharge properties of BaTiO3 based ceramics modified by Bi(Mg1/2Zr1/2)O3. Journal of the European Ceramic Society, 39 (4), 1103-1109.

Abstract

Lead-free (1-x)BaTiO₃-xBi(Mg_1/2Zr_1/2)O₃ ((1-x)BT-xBMZ) ceramics with peroskite structure were synthesized by solid-state reaction methods. (1-x)BT-xBMZ solid solution transforms from tetragonal (x≤0.04) to pseudocubic (x≥0.08) and exhibits a dispersive dielectric behavior with respect to frequency, showing typical relaxor characteristics with BMZ increasing. The optimal energy storage density of 1.25 J cm⁻³ and energy efficiency of >95% are obtained at x = 0.15, with maximum dielectric breakdown strength of 185 kV cm^-1 at 200 μm thickness., The energy storage density and energy efficiency of 0.85BT-0.15BMZ ceramics maintain at about 0.8 J cm⁻³ and 89% at 150 kV cm^-1 over temperature range of 25 °C∼150 °C, exhibiting good thermal stability. The pulse discharge capability of 0.85BT-0.15BMZ ceramics were measured under different electric fields, showing a short charge-discharge time of 1.3 μs. Therefore (1-x)BT-xBMZ solid solution with high energy density and efficiency, good temperature stability and fast discharge speed, is promising candidate for high power applications.