A-site compositional modulation in barium titanate based relaxor ceramics to achieve simultaneously high energy density and efficiency. Issue 13 (October 2021)

• Record Type: Journal Article
• Authors: Wang, Yuanhao; Wang, Tong; Wang, Jiahui; Liu, Jiaqi; Xing, Zhuo; Yang, Haibo; Kong, Luo; Cheng, Yan; Chen, Guanjun; Wang, Fen; Li, Chunchun
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 13(2021)
• Page Start: 6474
• Page End: 6481
• Publication Date: 2021-10
• Subjects: Barium titanate-based -- Ultrafast discharge rate -- Temperature and frequency stability -- Energy storage properties; 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.2021.05.052
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Dielectric ceramics capacitors (DCC) with excellent energy storage performance (ESP) and charge-discharge performance (CDP) is very critical in the field of advanced electronics and power systems. A strategy that improves the ESP of 0.6Ba(Zr0.2 Ti0.8 )O3 -0.4(Na0.5 Bi0.5 )TiO3 (BZT-NBT) ceramics was proposed via Sr 2+ doping. XRD and SEM results confirmed that 0.6(Ba1- x Sr x )(Zr0.2 Ti0.8 )O3 -0.4(Na0.5 Bi0.5 )TiO3 ( x = 0, 0.1, 0.2, 0.3, 0.4) (BSZT-NBT) ceramics formed dense and stable perovskite solid solutions. The relaxor ferroelectric (RFE) properties of BSZT-NBT ceramics were also well proved by dielectric behaviors. A large recoverable energy storage density ( W rec ) and large efficiency ( η ) of 3.72 J cm −3 and 94.03 % ( x = 0.3) can be simultaneously obtained at 289 kV cm -1 . ESP of BSZT-NBT ( x = 0.3) ceramics at 180 kV cm -1 exhibit good frequency (1−100 Hz) and temperature (room temperature (RT)-120 °C) stability. BSZT-NBT ( x = 0.3) ceramics at 120 kV cm −1 exhibit a prominent power density ( P D ) and rapid discharge rate ( t 0.9 ) of of 37.62 MW cm −3 and 70.6 ns. All evidences confirm that introduction of Sr 2+ into A-site of barium titanate-based ceramics could effectively improve ESP.