Dielectric temperature stability and energy storage performance of NBT‐based ceramics by introducing high‐entropy oxide
Shiyu Zhou, Yongping Pu, Xinyi Zhao, Tao Ouyang, Jiamin Ji, Qianwen Zhang, Canpeng Zhang, Shi‐Kuan Sun, Rong Sun, Junjie Li, Dawei Wang
Abstract
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.