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

被引：191

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

共 22 条

[1] Magnitude of the intrinsic electrocaloric effect in ferroelectric perovskite thin films at high electric fields [J].

Akcay, G. ;

Alpay, S. P. ;

Mantese, J. V. ;

Rossetti, G. A., Jr. .

APPLIED PHYSICS LETTERS, 2007, 90 (25)

[2] Dielectric properties of relaxor-like vinylidene fluoride - Trifluoroethylene-based electroactive polymers [J].

Bobnar, V ;

Vodopivec, B ;

Levstik, A ;

Kosec, M ;

Hilczer, B ;

Zhang, QM .

MACROMOLECULES, 2003, 36 (12) :4436-4442

[3] Interfacial reactions between Cu alloy and GaAs [J].

Chu, J. P. ;

Leau, W. K. ;

Lin, C. H. .

APPLIED PHYSICS LETTERS, 2008, 93 (16)

[4]

CROSS LE, 1987, FERROELECTRICS, V76, P241, DOI 10.2109/jcersj.99.829

[5]

Fatuzzo E., 1967, Ferroelectricity

[6] The giant electromechanical response in ferroelectric relaxors as a critical phenomenon [J].

Kutnjak, Z. ;

Petzelt, J. ;

Blinc, R. .

NATURE, 2006, 441 (7096) :956-959

[7] CRYOGENIC REFRIGERATION UTILIZING ELECTROCALORIC EFFECT IN PYROELECTRIC LITHIUM SULFATE MONOHYDRATE [J].

LANG, SB .

FERROELECTRICS, 1976, 11 (3-4) :519-523

[8]

Lines M. E., 1977, PRINCIPLES APPL FERR, P148

[9] Electrocaloric Materials for Solid-State Refrigeration [J].

Lu, Sheng-Guo ;

Zhang, Qiming .

ADVANCED MATERIALS, 2009, 21 (19) :1983-1987

[10] Giant electrocaloric effect in thin-film PbZr0.95Ti0.05O3 [J].

Mischenko, AS ;

Zhang, Q ;

Scott, JF ;

Whatmore, RW ;

Mathur, ND .

SCIENCE, 2006, 311 (5765) :1270-1271

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