Enhanced electrocaloric effect in Fe-doped (Ba0.85Ca0.15Zr0.1Ti0.9)O3 ferroelectric ceramics

被引：17
作者：
Patel, Satyanarayan [1 ]
Chauhan, Aditya [1 ]
Vaish, Rahul [1 ]
机构：
[1] Indian Inst Technol, Sch Engn, Mandi 175001, Himachal Prades, India
来源：
APPLIED MATERIALS TODAY | 2015年 / 1卷 / 01期
关键词：
Electrocaloric; Ferroelectric; Solid-state refrigeration;
D O I：
10.1016/j.apmt.2015.08.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Solid-state refrigeration systems employing bulk ferroelectric materials suffer from two main drawbacks of low temperature change and high depolarization temperature which prevent rapid commercialization. In this regard, the beneficial effects of Fe-doping on the electrocaloric performance of bulk ceramics with nominal composition Ba0.85Ca0.15Zr0.1Ti0.9-xFexO3 (BCZTO-Fe) have been investigated. Indirect predictions were made using Maxwell's relations in conjunction with data from experimental observations. It was revealed that 1% Fe doping can greatly improve the performance of BCZTO based compositions. A peak adiabatic temperature change of 0.86 K (345 K) was predicted for 0-37 kV/cm electric field, significantly higher (>100%) than pristine BCZTO ceramic. While a simultaneous increase in specific entropy change was also observed. The values indicate a huge improvement of the caloric capacity at reduced temperature indicating the benefits of such doping. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：37 / 44
页数：8
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