Enhanced energy density and thermal stability in relaxor ferroelectric Bi0.5Na0.5TiO3-Sr0.7Bi0.2TiO3 ceramics

被引：243
作者：
Qiao, Xiaoshuang [1 ]
Wu, Di [1 ]
Zhang, Fudong [1 ]
Niu, Mengshu [1 ]
Chen, Bi [1 ]
Zhao, Xumei [1 ]
Liang, Pengfei [2 ]
Wei, Lingling [3 ]
Chao, Xiaolian [1 ]
Yang, Zupei [1 ]
机构：
[1] Shaanxi Normal Univ, Sch Mat Sci & Engn, Shaanxi Engn Lab Adv Energy Technol, Key Lab Macromol Sci Shaanxi Prov,Shaanxi Key Lab, Xian 710062, Shaanxi, Peoples R China
[2] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Shaanxi, Peoples R China
[3] Shaanxi Normal Univ, Sch Chem & Chem Engn, Xian 710062, Shaanxi, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 15期
基金：
美国国家科学基金会;
关键词：
Bi0.5N0.5TiO3; Energy storage; Relaxation behaviour; Thermal stability; FIELD-INDUCED STRAIN; LEAD-FREE CERAMICS; STORAGE PROPERTIES; ELECTRIC-FIELD; STRUCTURE EVOLUTION; TEMPERATURE; PERFORMANCE; MICROSTRUCTURE; CAPACITORS;
D O I：
10.1016/j.jeurceramsoc.2019.07.003
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Sr0.7Bi0.2TiO3 (SBT) was introduced into Bi0.5Na0.5TiO3 (BNT) via a standard solid-state route to modulate its relaxation behaviour and energy storage performance. With increasing SBT content, the perovskite structure of BNT transforms from a rhombohedral phase to a weakly polarized pseudo-cubic phase, and the relaxation behaviour is enhanced. In particular, the E ms is improved from 120 kV/cm of BNT to 160 kV/cm of 0.6BNT-0.4SBT, which displays a large recoverable energy storage density (W-rec = 2.20 J/cm(3)), implying a large potential ability of energy storage for the 0.6BNT-0.4SBT ceramic. Moreover, both dielectric properties (28-326 degrees C) and energy storage properties (20-140 degrees C) exhibit a good thermal stability for the same 0.6BNT-0.4SBT composition. These characteristics suggest 0.6BNT-0.4SBT ceramic could be a promising candidate to be applied in a pulse power system over a broad temperature range.
引用
收藏
页码：4778 / 4784
页数：7
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