Enhanced electromechanical properties in all-polymer percolative composites

被引：95

作者：

Li, JY ^{[1
]}

Huang, C

Zhang, QM

机构：

[1] Univ Nebraska, Dept Engn Mech, Lincoln, NE 68588 USA

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

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

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 16期

关键词：

D O I：

10.1063/1.1702127

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we discuss the enhanced electrostriction and dielectric constant in an all-polymer percolative composite consisting of poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) [P(VDF-TrFE-CTFE)] terpolymer matrix and polyaniline (PANI) conductive particles. Using a self-consistent approach, we calculate the dielectric constant and dielectric loss tangent of the composite in excellent agreement with experiments, and demonstrate that the electrostriction enhancement is due to the electric field fluctuation in P(VDF-TrFE-CTFE) matrix, which becomes dominant when the dielectric constant of the second phase is much larger than that of the matrix. The inhomogeneous field distribution in the matrix has also been used to estimate the breakdown field of the composite, which agrees well with experimental measurement. The study could be used to design and optimize electrostrictive composites with optimal electromechanical properties. (C) 2004 American Institute of Physics.

引用

页码：3124 / 3126

页数：3

共 12 条

[11] Electrostriction: Nonlinear electromechanical coupling in solid dielectrics [J].