The study on the increase of relaxation and energy storage properties of (Na0.5Bi0.5)0.935Sr0.065TiO3 ferroelectric ceramic doped with Na0.7Bi0.08La0.02NbO3.

Autor: Lin, Fei, Yin, Qiyi, Zhang, Hui, Zheng, Ruihua, Zhang, Yulin, Chen, Chen, Du, Zhongrui, Si, Fan, Zhang, Quanzheng, Hu, Kunhong, Yang, Kejie, Zhu, Yangyang, Zou, Wangzu
Zdroj: Journal of Materials Science: Materials in Electronics; Dec2023, Vol. 34 Issue 34, p1-12, 12p
Abstrakt: In this experiment, a new lead-free energy storage ceramic (1-x)(Na0.5Bi0.5)0.935Sr0.065TiO3–xNa0.7Bi0.08La0.02NbO3 was prepared using a conventional solid-phase sintering process, and the influence of doping with Na0.7Bi0.08La0.02NbO3 on the relaxation and storage properties of this ceramic was systematically investigated. After multi-scale testing, the results demonstrate that the ceramic system forms a perovskite-structured solid solution with a dense single phase. The ceramic samples exhibit a homogeneous microstructure with smaller grain sizes as doping increases, which enhances the breakdown field strength (30 kV/mm), as detected by SEM. The ceramic in this system demonstrates good electrical qualities, with a recoverable energy storage density of Wrec = 7.44 J/cm3 and energy storage efficiency of η = 87.70% at a field strength of 30 kV/mm at x = 0.20, according to the findings of the electrical properties test. It also also exhibits good stability over a wide frequency range (5–100 Hz): Wrec = 7.2 ± 3% J/cm3, η = 86.1 ± 3.2%, and over a wide temperature range (30–170 °C): Wrec = 7.1 ± 5% J/cm3, η = 83.1 ± 4.3%. Additionally, it has a fast discharge rate of t0.9 = 0.35 µs. This excellent electrical property predicts that this system of ceramics has great application prospects in the field of energy storage capacitors in the future. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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