Dielectric temperature stability and energy storage performance of NBT‐based ceramics by introducing high‐entropy oxide

作者：Shiyu Zhou, Yongping Pu, Xinyi Zhao, Tao Ouyang, Jiamin Ji, Qianwen Zhang, Canpeng Zhang, Shi‐Kuan Sun, Rong Sun, Junjie Li, Dawei Wang · 发表于：Journal of the American Ceramic Society · 年份：2022 · DOI：10.1111/jace.18455 · 被引用次数：147 · 研究领域：Ferroelectric and Piezoelectric Materials、Microwave Dielectric Ceramics Synthesis、Thermal Expansion and Ionic Conductivity

Abstract In this study, a high‐entropy perovskite oxide Sr(Zr 0.2 Sn 0.2 Hf 0.2 Ti 0.2 Nb 0.2 )O 3 (SZSHTN) was first introduced to Na 0.5 Bi 0.5 TiO 3 (NBT) lead‐free ferroelectric ceramics to boost both the high‐temperature dielectric stability and energy storage performance. Excellent comprehensive performance was simultaneously obtained in the 0.8NBT–0.2SZSHTN ceramic with high ε ′ value (> 2000), wide ε ′‐temperature stable range (TCC < 5%, 52.4–362°C), low tan δ value in a wide range (<0.01, 90–341°C) and high energy storage performance ( W rec = 3.52 J/cm 3 , W rec and η varies ±6.08% and ±7.4% from 20 to 150°C), which endows it the promising potential to be used in high‐temperature environments.