基于有效介质理论碳纤维的介电常数计算  

Calculation on permittivity of carbon fiber based on effective medium theory

作　　者：秦思良[1] 王庆国[1] 曲兆明[1] 雷忆三[2] 

机构地区：[1]军械工程学院静电与电磁防护研究所,河北石家庄050003 [2]中国电子科技集团第33研究所,山西太原030006

出　　处：《河北科技大学学报》2012年第4期309-312,共4页Journal of Hebei University of Science and Technology

基　　金：装备预研基金资助项目(9140A31030110JB3403)

摘　　要：采用M-G方程、Bruggeman方程和广义M-G方程计算了复合材料内碳纤维的介电常数。结果表明:当纤维长径比较大时,3个方程均可以计算出碳纤维的介电常数,并且数量级和趋势保持一致;广义M-G和M-G方程的计算结果较为一致,而Bruggeman方程则小于其余两者的计算结果;当碳纤维浓度上升至渗流浓度附近时,3个方程计算结果均出现一定程度的偏离,表明3个方程均适用于低浓度情况。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.

关 键 词：M-G方程 Bruggeman方程 广义M-G方程 介电常数 碳纤维 

分 类 号：TM153.5[电气工程—电工理论与新技术]