Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers

被引：194

作者：

Lu, S. G. ^{[1
]}

Rozic, B. ^{[2
]}

Zhang, Q. M. ^{[1
]}

Kutnjak, Z. ^{[2
]}

Pirc, R. ^{[2
]}

Lin, Minren ^{[1
]}

Li, Xinyu ^{[1
]}

Gorny, Lee ^{[1
]}

机构：

[1] Penn State Univ, Dept Elect Engn, Mat Res Inst, University Pk, PA 16802 USA

[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 20期

关键词：

REFRIGERATION; COPOLYMER; BEHAVIOR;

D O I：

10.1063/1.3514255

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the directly measured electrocaloric effect (ECE) (the adiabatic temperature change Delta T) of relaxor ferroelectric poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer and its blend with poly (vinylidene fluoride-chlorotrifluoroethylene). The results show that the directly measured Delta T in the relaxor terpolymer is much larger than that deduced from Maxwell relation and that the relaxor terpolymer possesses a giant ECE at room temperature. The large difference between the directly measured Delta T and that deduced indicates that the Maxwell relation, which is derived for ergodic systems, is not suitable for deducing ECE in the relaxor ferroelectric polymers, which are nonergodic (polar-glass) material systems. (C) 2010 American Institute of Physics. [doi:10.1063/1.3514255]

引用

页数：3

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