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Electric properties of carbon black–epoxy resin composites at microwave frequencies
Author(s) -
Achour M. E.,
El Malhi M.,
Miane J. L.,
Carmona F.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960912)61:11<2009::aid-app15>3.0.co;2-3
Subject(s) - epoxy , composite material , carbon black , materials science , microwave , carbon fibers , composite number , natural rubber , physics , quantum mechanics
This present paper is a study of the dielectric behavior of carbon black–epoxy resin composites at the microwave frequencies 9.5 and 35 GHz. The results of this research have shown that the complex propagation constant γ g for these mediums depends on the frequency F , on the volume concentration ϕ of the conducting medium, and on the particle size. Numerical simulations allow us to fit the dependence of the measures upon the sample thickness, but we have to assign dielectric and diamagnetic properties of the heterogeneous medium. The permittivity and the permeability depend on the particle concentration, and the real part of the permeability is always smaller than unity. © 1996 John Wiley & Sons, Inc.