Latent heat study of phase transition in Ba0.73Sr0.27TiO3 induced by electric field

Lin  GC; Xiong  XM; Zhang  JXWei  Q

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Latent heat study of phase transition in Ba0.73Sr0.27TiO3 induced by electric field

机译：Latent heat study of phase transition in Ba0.73Sr0.27TiO3 induced by electric field

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摘要

We have developed a modified power-compensation DSC to evaluate the electrocaloric properties of ferroelectrics. With this apparatus, latent heat of electric-field-induced phase transition in Ba0.73Sr0.27TiO3 (BST) ferroelectric ceramics has been investigated in detail. It varies with temperature and reaches its climax at 25 degrees C, close to the ferroelectric-paraelectric phase transition temperature, when induced by the same electric field of 15 kV cm(-1). The theoretical saturated endothermicity induced by enough high electric field at 25 degrees C is expected to 0.59 J g(-1), which is 84% of the total phase transition latent heat of BST. At last the origins of difference between exothermicity and endothermicity are discussed.

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来源
《Journal of thermal analysis and calorimetry》 |2005年第1期|41-44|共4页
作者
Lin GC; Xiong XM; Zhang JXWei Q;
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作者单位

Zhongshan Univ, State Key Lab Optoelect Mat & Technol, Ghangzhou 510275, Peoples R China;

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正文语种英语
中图分类分析化学;
关键词
Ba1-xSrxTiO3; DSC; electric-field-induced phase transition; ferroelectrics; latent heat; power-compensation DSC;

Latent heat study of phase transition in Ba0.73Sr0.27TiO3 induced by electric field

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