材料科学
陶瓷
储能
兴奋剂
化学工程
电介质
电场
固溶体
烧结
离子
分析化学(期刊)
微观结构
作者
Jing Li,Li Jin,Ye Tian,Chao Chen,Yu Lan,Qingyuan Hu,Chao Li,Xiaoyong Wei,Haixue Yan
标识
DOI:10.1016/j.jmat.2021.10.005
摘要
Abstract Herein, Ag1-3xSmxNbO3 (0 ≤ x ≤ 0.025) antiferroelectric ceramics were successfully synthesized by solid state methods. The effect of Sm3+ doping on the structure, property and energy storage performance were studied. With the increasing Sm3+ concentrations, the average grain size decreased. Meanwhile, the stability of high temperature M phases (i.e., the structure between Tf and T3) was expanded, which led to low loss for energy storage. Both of structure analysis and ferroelectric tests revealed the existence of weakly polar/AFE-like phase below Tf. The Sm3+ doping tended to suppress the ferroelectric behavior and expand the stability of antiferroelectricity. Consequently, a significantly enhanced energy storage performance (Wrec = 3.8 J/cm3, η = 73 %) could be achieved in Ag0.97Sm0.01NbO3 ceramic, which was almost 1.5 times larger than that in non-doped AgNbO3 (Wrec = 2.4 J/cm3, η = 45 %) under the similar applied field of 1705 kV/cm ± . In particular, the performance of the ceramic showed great temperature stability with variation of ± 5 % from 25 °C to 125 °C. These results indicated that the Ag0.97Sm0.01NbO3 ceramic could be an ideal lead-free candidate used in the energy storage field.
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