Study on dielectric behavior of a three-phase CF/(PVDF+BaTiO3) composite

被引：94

作者：

Dang, ZM ^{[1
]}

Fan, LZ ^{[1
]}

Shen, Y ^{[1
]}

Nan, CW ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 369卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/S0009-2614(02)01992-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A three-phase composite with a conductive carbon-fiber (CF) and ferroelectric phase (BaTiO3) embedded into polyvinylidene fluoride (PVDF) was prepared by using a simple blending and hot-molding technique. The dielectric properties of composites containing CF in (PVDF + BaTiO3) matrix as a function of the frequency and the volume fraction of CF were studied. The dielectric constant has a weak dependence on the frequency below 1 MHz and increases rapidly when the CF content is very close to the percolation threshold. The temperature has little effect on the variation of the dielectric constant. The percolation theory and the microstructure of the composites with CF are used to explain the experimental results. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：95 / 100

页数：6

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