Electrocaloric and electrostrictive effect of polar P(VDF-TrFE-CFE) terpolymers

作     者：Sheng-Guo Lu Hui Xiong Aixiang Wei Xinyu Li Qiming Zhang 

作者机构：School of Materials and EnergyGuangdong University of Technology 100 WaihuanxiluGuangzhou Higher Education Mega CenterGuangzhou 510006P.R.China Materials Research Institute and Electrical Engineering Department University ParkPennsylvania 16802USA 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2013年第3卷第2期

页      面：64-67页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：This work was supported by the "100 Talents Scheme" fund at the Guangdong University of Technology 

主　　题：Polar polymers electrocaloric effect electrostrictive properties polarization 

摘      要：The electrocaloric effect(ECE)is the adiabatic temperature change or isothermal entropy change caused by the polarization change of a dielectric material when subjected to a change of external electric *** electrostrictive effect is a form of elastic deformation of a dielectric induced by an electric field,associated with those components of strain which are independent of reversal field *** was found that both the ECE,e.g.,adiabatic temperature change,and the electrostrictive strain in poly(vinylidene fluoride
trifluoroethylene
chlorofluoroethylene)(P(VDF-TrFE-CFE))terpolymers are proportional to the square of the electric *** adiabatic temperature change
ΔT of ECE versus electric field can be illustrated using a modified Belov
Goryaga equation.
ΔT is proportional to E^(2) when E is *** electrostrictive effect,the rigid-ion model assumes that the anharmonic movement of the ions leads to the quadratic strain
electric field *** quotient of electrostrictive coefficient Q over the phenomenological coefficient
is empirically a constant,indicating that the larger the electrostrictive coefficient,the larger the ECE,which opens a new way to find out new electrocaloric materials.