Nonadiabatic direct measurement electrocaloric effect in lead-free Ba,Ca(Zr,Ti)O3 ceramics

被引：81

作者：

Wang, Jinfei ^{[1
]}

Yang, Tongqing ^{[1
]}

Chen, Shengchen ^{[1
]}

Li, Gang ^{[1
]}

Zhang, Qingfeng ^{[1
]}

Yao, Xi ^{[1
]}

机构：

[1] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 550卷

关键词：

Nonadiabat direct measured; Electrocaloric; Lead-free; Remove applied electric; FIELD;

D O I：

10.1016/j.jallcom.2012.10.144

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrocaloric effect (ECE) of lead-free Ba,Ca(Zr,Ti)O-3 ceramics was researched. The Ba,Ca(Zr,Ti)O-3 ceramics is with the characteristics of slimmer P-E hysteresis loops, and direct thermometry displays an electrocaloric effect over a wide range temperatures from room temperature to 105 degrees C. The temperature change Delta T increased with increasing of applied electric field and measurement temperature, and reached the maximum of similar to 0.6 K at 85 degrees C with an applied electric field of 40 kV/cm. For comparison, indirect theoretical calculation was given by, thermodynamic equation analysis of P-E hysteresis loops with different temperature. The magnitude of indirect calculation Delta T was about 2.33 K for BCZT samples. We also compare the difference of two results. The direct measurement was carried in non-adiabatic, so the experimental data Delta T was smaller than the theoretical value. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：561 / 563

页数：3

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