Results
Title

Achieving Enhanced Energy‐Storage Performances in Bi<sub>0.5</sub>(K<sub>0.15</sub>Na<sub>0.85</sub>)<sub>0.5</sub>TiO<sub>3</sub> Ceramics Modified by Sr(Ti<sub>0.85</sub>Zr<sub>0.15</sub>)O<sub>3</sub>.

Authors

Qiang, Hua; Deng, Lingyun; Xu, Zunping

Abstract

Lead‐free (1−x)Bi0.5(K0.15Na0.85)0.5TiO3‐xSr(Ti0.85Zr0.15)O3 ((1−x)BKNT‐xSTZ, x = 0.1–0.4) ceramics are synthesized by citrate combustion method. The grain size is reduced, and the high‐temperature shoulder dielectric peak (Tm) shifts toward low temperature, while the low‐temperature shoulder dielectric peak (Ts) shifts toward high temperature as x increases. The remnant polarization decreases and slimmer hysteresis loops are realized with x increasing. The optimal energy density (Wre ≈2.85 J cm−3) with high efficiency (η ≈ 81%) is obtained for 0.7BKNT‐0.3STZ at 160 kV cm−1. More importantly, excellent frequency stability and enhanced temperature‐dependent energy properties (Wre ≈ 1.12 J cm−3 and η ≈ 94%) of 0.7BKNT‐0.3STZ ceramic are obtained at 100 kV cm−1 and 120 °C.

Publication

Physica Status Solidi. A: Applications & Materials Science, 2022, Vol 219, Issue 11, p1

ISSN

1862-6300

Publication type

Academic Journal

DOI

10.1002/pssa.202200071