Electromagnetic interference shielding effectiveness of carbon black and carbon fibre filled EVA and NR based composites

被引:393
作者
Das, NC
Khastgir, D [1 ]
Chaki, TK
Chakraborty, A
机构
[1] Indian Inst Technol, Ctr Rubber Technol, Kharagpur 721302, W Bengal, India
[2] Indian Inst Technol, Dept Elect & Elect Commun Engn, Kharagpur 721302, W Bengal, India
关键词
electromagnetic interference; carbon fibre;
D O I
10.1016/S1359-835X(00)00064-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Electromagnetic interference (EMI) shielding characteristics of natural rubber and ethylene vinyl acetate filled with conductive carbon black (Vulcan XC-72) and short carbon fibre (SCF) have been studied. The measurements of shielding effectiveness (SE) were carried out in two different frequency ranges 100-2000 MHz and 8-12 GHz (X-band range). The return loss and loss due to absorption were also measured as a function of frequency in the X-band range and microwave region. It is observed that the SE of the composites is frequency dependent, especially at higher frequency range, and it increases with the increasing frequency. The SE also increases with the increase in filler loading. The SCF filled composites show higher SE compared to that of conductive carbon black. The correlation between SE and conductivity of the various composites is also discussed. The results indicate that the composites having higher firn loading (greater than or equal to 20 phr) can be used for the purpose of EMI shielding, as well as for some microwave applications. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1069 / 1081
页数:13
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