Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride-trifluoroethylene) copolymers near a first-order ferroelectric transition

被引：84

作者：

Li, Xinyu ^{[1
,2
]}

Qian, Xiao-Shi ^{[1
,2
]}

Gu, Haiming ^{[1
,2
]}

Chen, Xiangzhong ^{[1
,2
]}

Lu, S. G. ^{[1
,2
]}

Lin, Minren ^{[1
,2
]}

Bateman, Fred ^{[3
]}

Zhang, Q. M. ^{[1
,2
]}

机构：

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

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[3] NIST, Radiat & Biomol Phys Div, Gaithersburg, MD 20899 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 13期

关键词：

ELECTROMECHANICAL RESPONSE; BEHAVIOR;

D O I：

10.1063/1.4756697

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present directly measured electrocaloric effect (ECE) from the poly(vinylidenefluoride-trifluoroethylene) 65/35 mol. % copolymer. The data reveal a large difference in the ECE between that measured in applying and in removing the electric field. The difference is significantly reduced by modifying the copolymer with 20 Mrad of high energy electron irradiation. Moreover, an isothermal entropy change Delta S-int = 160 J kg(-1) K-1 and an adiabatic temperature change Delta T-int = 35 degrees C can be induced in the irradiated copolymer. These results demonstrate the promise of achieving a significant ECE in ferroelectric polymers near first-order ferroelectric-paraelectric transition where multiple intermediate phases can exist. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4756697]

引用

页数：4

共 23 条

[1] Enhanced cooling capacities of ferroelectric materials at morphotropic phase boundaries [J].

Chukka, Rami ;

Cheah, Jun Wei ;

Chen, Zuhuang ;

Yang, P. ;

Shannigrahi, S. ;

Wang, Junling ;

Chen, Lang .

APPLIED PHYSICS LETTERS, 2011, 98 (24)

[2] Investigation of the electrocaloric effect in a PbMg2/3Nb1/3O3-PbTiO3 relaxor thin film [J].

Correia, T. M. ;

Young, J. S. ;

Whatmore, R. W. ;

Scott, J. F. ;

Mathur, N. D. ;

Zhang, Q. .

APPLIED PHYSICS LETTERS, 2009, 95 (18)

[3] Polarization rotation mechanism for ultrahigh electromechanical response in single-crystal piezoelectrics [J].

Fu, HX ;

Cohen, RE .

NATURE, 2000, 403 (6767) :281-283

[4]

Furukawa T, 2001, FERROELECTRICS, V264, P1739

[5]

Jona F., 1993, Ferroelectric crystal

[6] Predicted cooling powers for multilayer capacitors based on various electrocaloric and electrode materials [J].

Kar-Narayan, S. ;

Mathur, N. D. .

APPLIED PHYSICS LETTERS, 2009, 95 (24)

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

Kutnjak, Z. ;

Petzelt, J. ;

Blinc, R. .

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

[8] Tunable temperature dependence of electrocaloric effect in ferroelectric relaxor poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene terpolymer [J].

Li, Xinyu ;

Qian, Xiao-shi ;

Lu, S. G. ;

Cheng, Jiping ;

Fang, Zhao ;

Zhang, Q. M. .

APPLIED PHYSICS LETTERS, 2011, 99 (05)

[9]

Lines M. E., 2001, Principles and Applications of Ferroelectrics and Related Materials

[10] Maximizing the number of coexisting phases near invariant critical points for giant electrocaloric and electromechanical responses in ferroelectrics [J].

Liu, Z. K. ;

Li, Xinyu ;

Zhang, Q. M. .

APPLIED PHYSICS LETTERS, 2012, 101 (08)

← 1 2 3 →