Enhanced energy density and thermal stability in relaxor ferroelectric Bi0.5Na0.5TiO3-Sr0.7Bi0.2TiO3 ceramics. Issue 15 (December 2019)

• Record Type: Journal Article
• Authors: Qiao, Xiaoshuang; Wu, Di; Zhang, Fudong; Niu, Mengshu; Chen, Bi; Zhao, Xumei; Liang, Pengfei; Wei, Lingling; Chao, Xiaolian; Yang, Zupei
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 15(2019)
• Page Start: 4778
• Page End: 4784
• Publication Date: 2019-12
• Subjects: Bi0.5Na0.5TiO3 -- Energy storage -- Relaxation behaviour -- Thermal stability; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.07.003
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Sr0.7 Bi0.2 TiO3 (SBT) was introduced into Bi0.5 Na0.5 TiO3 (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 DBS 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 °C) and energy storage properties (20–140 °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.