Correlations between electrocaloric effect and dielectric diffuseness of lead-free Ba(Ti1-xSnx)O3 ceramics

Affiliation of Author(s):Shandong University

Journal:Journal of Alloys and Compounds

Abstract:This paper reported the correlations between electrocaloric effect (ECE) and dielectric diffuseness of Ba(Ti1-xSnx)O-3 (abbreviated as BT-100xSn) ceramics. The BT-100xSn with pure perovskite structure has been synthesized by conventional solid-state reaction method. The temperature dependence of dielectric per-mittivity indicates that all the BT-100xSn ceramics are normal ferroelectric with diffused phase transition, and the dielectric diffuseness is strengthened as the Sn contents increase. The maximum ECE takes place in the vicinity of phase transition point, which is the characteristic of normal ferroelectrics. The BT-8Sn indicates the largest Delta T = 0.46 K and Delta T/Delta E = 0.30 x 10(-6) K m/V. The substitutions of Sn contents adjust the maximum ECE to different temperatures, and the good temperature-modulation of ECE is beneficial for the realization of ECE application. Considering the correlations between ECE and dielectric diffuseness, the experimental results demonstrate that the stronger dielectric diffuseness leads to the strengthened temperature stabilities of ECE but accompanied with decreased maximum ECE.

All the Authors:En-Meng Liang

First Author:Ye Zhao

Indexed by:Journal paper

Correspondence Author:Xian Zhao,Chun-Ming Wang

Volume:910

Page Number:164826

Number of Words:5000

Translation or Not:no

Date of Publication:2022-07-01

Included Journals:SCI

Date of Publication:2022-07-01