1. High recoverable energy storage density of Na0.5Bi0.5TiO3 lead-free ceramics modified by Bi(Mg0.5Hf0.5)O3.
- Author
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Wang, Kaiyuan, Li, Wenhua, Tang, Xingui, Zhang, Siyuan, Zhang, Yansong, Hu, Jia, Shen, Zhihao, Jiang, Yanping, and Guo, Xiaobin
- Subjects
LEAD-free ceramics ,ENERGY storage ,ENERGY density ,ELECTRIC breakdown ,CERAMICS ,ELECTRONIC systems - Abstract
Enhancing the availability and reliability of dielectric ceramic energy storage devices is of great importance. In this work, (1- x) Na 0. 5 Bi 0. 5 TiO 3 – x Bi( Mg 0. 5 Hf 0. 5 ) O 3 (NBT– x BMH) lead-free ceramics were created utilizing a solid-state reaction technique. All NBT– x BMH ceramics have a single perovskite structure. With increasing BMH doping, the grain size shrinks drastically, which greatly enhances the breakdown electric field (310 kV/cm at x = 0.25). Additionally, the relaxation behaviors of NBT– x BMH ceramics with high BMH content are more remarkable. Among all designed components, the NBT–0.25BMH ceramic exhibits the best energy storage performance with a high W rec of 4.63 J/ cm 3 and an η of 75.1% at 310 kV/cm. The NBT–0.25BMH ceramic has exceptional resistance to fluctuations in both frequency (5–500 Hz) and temperature (30–100 ∘ C). Charge–discharge test shows that the NBT–0.25BMH ceramic has a quick discharge rate ( t 0. 9 < 110 ns). With these properties, the NBT–0.25BMH ceramic may have applications in microdevices as well as in ultra-high power electronic systems. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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