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

In this study, a high-entropy perovskite oxide Sr(Zr0.2Sn0.2Hf0.2Ti0.2Nb0.2)O-3 (SZSHTN) was first introduced to Na0.5Bi0.5TiO3 (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 epsilon ' value (> 2000), wide epsilon '-temperature stable range (TCC < 5%, 52.4-362 degrees C), low tan delta value in a wide range (<0.01, 90-341 degrees C) and high energy storage performance (W-rec = 3.52 J/cm(3), W-rec and eta varies +/- 6.08% and +/- 7.4% from 20 to 150 degrees C), which endows it the promising potential to be used in high-temperature environments.

Automated summary

In this study, a high-entropy perovskite oxide was introduced into lead-free ferroelectric ceramics to enhance the high-temperature dielectric stability and energy storage performance. The ceramic showed excellent comprehensive performance, making it promising for high-temperature applications.