High polarization stability of Sr modified Pb(Zr,Sn)NbO3 antiferroelectric ceramics
Yue Luo, Bing Han, Zhengqian Fu, Yongxin Zhou, Jiake Xia, Xuefeng Chen, Genshui Wang
Abstract
Abstract The energy storage performance of antiferroelectric ceramic capacitors has always gain much attention. Hysteresis, transition field, and polarization intensity are crucial factors influencing energy storage performance. A‐site doped small radius ions have been shown in numerous investigations to enhance the switching field, minimize hysteresis, but decrease maximum polarization intensity. How to maintain the high polarization while optimizing other parameters is a great challenge, and this problem has received scant attention in the research literature to date. In this work, Pb 1‐x Sr x (Zr 0.54 Sn 0.46 ) 0.975 Nb 0.02 O 3 (x = 0, 0.02, 0.06, 0.08, 0.1, 0.12, 0.14, 0.16, 0.20) antiferroelectric ceramics show high polarization stability. When the Sr 2+ content is within 12 mol%, the saturation polarization intensity always remains at a large value (> 44μC/cm 2 ), and the rate of change is as low as 6%. Pb 0.92 Sr 0.08 (Zr 0.54 Sn 0.46 ) 0.975 Nb 0.02 O 3 also displays great polarization temperature stability with a minimal change rate of 8.5% in a wide temperature range from ‐55 to 85°C. Additionally, this ceramic also has a superior energy storage performance that the recoverable energy density and energy storage efficiency and 8.95 J/cm 3 and 80.4%, respectively. This work paves the way for practical simultaneous polarization and other parameter optimization.