Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

被引：33
|
作者：
Aziguli, Haibibu [1 ,2 ]
Chen, Xin [2 ]
Liu, Yang [2 ]
Yang, Guang [2 ]
Yu, Ping [1 ]
Wang, Qing [2 ]
机构：
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Sichuan, Peoples R China
[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 19期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
SOLID-STATE REFRIGERATION; POLYMER NANOCOMPOSITES; CERAMICS; RANGE;
D O I：
10.1063/1.5028459
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the electrocaloric effect in the composites composed of the ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free BaZr0.2Ti0.8O3 (BZT) fillers. The P(VDF-TrFE-CFE)/BZT composite with 5 vol. % BZT exhibits a high adiabatic temperature change of Delta T = 7.4 K and a large isothermal entropy change of Delta S = 30 J kg(-1) K-1 under an electric field of 90 MV m(-1) at room temperature. The electrocaloric response in the composites is significantly enhanced when compared to those of the constituent components, which has been attributed to the polymer-filler interfacial coupling effect. In addition, the composites display a wide operational temperature window as a result of their ferroelectric relaxor nature. Published by AIP Publishing.
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收藏
页数：4
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