Design and preparation of lead-free (Bi0.4Na0.2K0.2Ba0.2)TiO3-Sr(Mg1/3Nb2/3)O3 high-entropy relaxor ceramics for dielectric energy storage

被引：69
作者：
Yan, Bo [1 ]
Chen, Kepi [1 ]
An, Linan [2 ]
机构：
[1] North China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China
[2] Dongguan Univ Technol, Sch Mech Engn, Dongguan 523808, Guangdong, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2023年 / 453卷
关键词：
High -entropy ceramics; Dielectric energy storage; Relaxor ferroelectrics; Lead-free relaxor; DENSITY; CAPACITORS; EFFICIENCY;
D O I：
10.1016/j.cej.2022.139921
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
High-entropy perovskite oxides in (Bi0.4Na0.2K0.2Ba0.2)TiO3- Sr(Mg1/3Nb2/3)O3 system were designed and pre-pared for dielectric energy storage. The effects of composition and sintering temperature on energy storage performance were investigated. The temperature-and frequency-dependent energy storage performance was characterized. A ceramic with a recoverable energy storage density of 3.37 J/cm3 and an energy storage effi-ciency of 80 % was obtained at 310 kV/cm. The energy density is one of the best ever reported at low electric fields. The current result provides an idea for developing high-entropy dielectric energy storage ceramics.
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页数：8
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