Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature

被引：175
|
作者：
Luo, Zhengdong [1 ,2 ]
Zhang, Dawei [1 ,2 ]
Liu, Yang [1 ,2 ,3 ]
Zhou, Di [1 ,2 ]
Yao, Yonggang [1 ,2 ]
Liu, Chenqi [1 ,2 ]
Dkhil, Brahim [3 ]
Ren, Xiaobing [1 ,2 ]
Lou, Xiaojie [1 ,2 ]
机构：
[1] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, Multidisciplinary Mat Res Ctr, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[3] Ecole Cent Paris, Lab Struct Proprietes & Modelisat Solides, CNRS, UMR 8580, F-92295 Chatenay Malabry, France
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 10期
基金：
美国国家科学基金会;
关键词：
STATE;
D O I：
10.1063/1.4895615
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The electrocaloric effect in lead-free BaTi1-xSnxO3 (BTSn, x = 0.08, 0.105, and 0.14) ferroelectric ceramics was studied by using an indirect method. It was found that the largest electrocaloric response could be achieved in BTSn with x = x(QP) = 0.105 near room temperature with an adiabatic temperature change Delta T of 0.61K and an electrocaloric strength Delta T/Delta E of 0.31K mm kV(-1), under a modest electric field Delta E of 20 kV cm(-1), which is comparable with the best values reported in lead-free materials. These enhanced values are attributed to the multiphase (four phases) coexistence at x = x(QP) corresponding to the quasi-quadruple point composition. (C) 2014 AIP Publishing LLC.
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页数：5
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