Anisotropic Dielectric Properties of Short Carbon Fiber Composites

doi:10.3724/SP.J.1077.2012.12364

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (11): 1223-1227.DOI: 10.3724/SP.J.1077.2012.12364

• Research Letter • Previous Articles Next Articles

Anisotropic Dielectric Properties of Short Carbon Fiber Composites

FU Jin-Gang, ZHU Dong-Mei, ZHOU Wan-Cheng, LUO Fa

(State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China)

Received:2012-06-01 Revised:2012-06-13 Published:2012-11-20 Online:2012-10-25
About author:FU Jin-Gang(1987–), male, candidate of master degree. E-mail: fjg0608034215@163.com
Supported by:
National Natural Science Foundation of China(51072165)

Abstract

Abstract: Dielectric materials based on short carbon fiber (Csf) dispersed inside epoxy resin (EP) matrix composites were prepared. The complex permittivity of two types of distributions over the frequency range from 2.6 GHz to 8.2 GHz was reported. The effects of orientation with different content and length of carbon fibers on dielectric properties were investigated. It is found that axial permittivity of carbon fibers is several times larger than their radial permittivity. The real and imaginary parts of complex permittivity increase gradually with increasing the Csf contents in the composites, and the fiber length also affects the anisotropic property greatly. The two layered transmission line model is used to explain the phenomena.

Key words: anisotropic, dielectric properties, composite materials, short carbon fiber

CLC Number:

TB34

FU Jin-Gang, ZHU Dong-Mei, ZHOU Wan-Cheng, LUO Fa. Anisotropic Dielectric Properties of Short Carbon Fiber Composites[J]. Journal of Inorganic Materials, 2012, 27(11): 1223-1227.

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Anisotropic Dielectric Properties of Short Carbon Fiber Composites

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