Calculation on permittivity of carbon fiber based on effective medium theory

(1. Institute of Electrostatic and Electromagnetic Protection, Ordnance Engineering College, Shijiazhuang Hebei 050003, China;2. The 33rd Institute, China Electronics Technology Group Corporation, Taiyuan Shanxi 030006, China)

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    The permittivity of carbon fibers in different composites is calculated and discussed by using M-G equations, Bruggeman equations and generalized M-G equation. Results show that for high draw ratio fibers, all the three equations can calculate out the permittivity with the same numerical level and variation trend. Generalized M-G equation and M-G equation have a similar result but Bruggeman''s result is smaller. All three equations become invalidation when fibers'' concentration reaches its percolation threshold, which means that all three equations are useful at low concentration.

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QIN Si-liang, WANG Qing-guo, QU Zhao-ming, LEI Yi-san. Calculation on permittivity of carbon fiber based on effective medium theory[J]. Journal of Hebei University of Science and Technology,2012,33(4):309-312

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  • Received:March 19,2012
  • Revised:May 01,2012
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  • Online: August 29,2013
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