Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on Electromagnetic Interference Shielding Effectiveness of the Metal Powders and Nano Carbon black /Fiber Reinforced Epoxy composites

메탈 파우더와 나노 카본 블랙/섬유강화 복합재료의 전자파 차폐효과에 관한 연구

  • 한길영 (조선대학교 기계공학과) ;
  • 김진석 (조선대학교 대학원 기계공학과) ;
  • 안동규 (조선대학교 기계공학과)
  • Published : 2006.08.01
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Abstract

The objective of this research is to investigate the electromagnetic interference(EMI) shielding characteristics of fiber reinforced composites. We fabricated glass and carbon fiber reinforced composites filled with metal powder and nano carbon black. The measurements of shielding effectiveness(SE) were carried out frequency range 300MHz - 1GHz for commercial purposes such as electric or telecommunication devices. The return loss and loss due to absorption were also measured as a function of frequency in the micro wave(300MHz-1GHz) region. It is observed that the SE of the composites is the frequency dependent, increase with the increases in filler loading. The Mg metal powder filled composite showed higher SE compared to that of carbon black. The Mg metal powder/epoxy composite was shown to exhibit up to 40dB of SE. The results indicates that the composite having higher filler loading can be used for the purpose of EMI shielding as well as for some microwave applications.

Keywords

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