Enhanced electrocaloric effect in ferroelectric poly(vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer at ferroelectric-paraelectric transition

被引：107

作者：

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

Rozic, B. ^{[2
]}

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

Kutnjak, Z. ^{[2
]}

Neese, Bret ^{[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 | 2011年 / 98卷 / 12期

关键词：

POLYVINYLIDENE FLUORIDE; PYROELECTRICITY; PIEZOELECTRICITY; POLYMERS;

D O I：

10.1063/1.3569953

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electrocaloric effect (ECE) of the ferroelectric poly (vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer was directly measured over a broad temperature range using a specially designed calorimetry method. The data reveal a large ECE occurring at the ferroelectric-paraelectric (FE-PE) phase transition where an adiabatic temperature change similar to 12 degrees C was induced under a field of 120 MV/m, which is much higher than that previously observed at above the FE-PE transition. The directly measured ECE also confirms the earlier results deduced from the indirect method. The experimental data also show that there are secondary effects contributing to the observed ECE in the polymer. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3569953]

引用

页数：3

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