12. Comparison of Electromagnetic Shielding in GFR-Nano Composites

  1. William M. Mullins,
  2. Andrew Wereszczak and
  3. Egar Lara-Curzio
  1. Woo-Kyun Jung1,
  2. Sung-Hoon Ahn2 and
  3. Myong-Shik Won3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291375.ch12

Synthesis and Processing of Nanostructured Materials: Ceramic Engineering and Science Proceedings, Volume 27, Issue 8

Synthesis and Processing of Nanostructured Materials: Ceramic Engineering and Science Proceedings, Volume 27, Issue 8

How to Cite

Jung, W.-K., Ahn, S.-H. and Won, M.-S. (2007) Comparison of Electromagnetic Shielding in GFR-Nano Composites, in Synthesis and Processing of Nanostructured Materials: Ceramic Engineering and Science Proceedings, Volume 27, Issue 8 (eds W. M. Mullins, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291375.ch12

Author Information

  1. 1

    Seoul National University of Korea 301B/D 1255-1, San56-1, Shinlim, Kwanak, Seoul, Korea, 151-742

  2. 2

    Seoul National University of Korea 301B/D 1205, San56-1, Shinlim, Kwanak, Seoul, Korea, 151-742

  3. 3

    Agency for Defence Development Yuseong P.O. Box 35, Daejeon, Korea, 305-600

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2007

ISBN Information

Print ISBN: 9780470080511

Online ISBN: 9780470291375

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Keywords:

  • shielding;
  • electromagnetic;
  • magnetic;
  • propagation;
  • particles

Summary

The research on electromagnetic shielding has been advanced for military applications as well as for commercial products. Utilizing the reflective properties and absorptive properties of shielding material, the replied signal measured at the rear surface, or at the signal source can be minimized. The shielding effect was obtained from such materials that have high absorptive properties and structural characteristics, for example stacking sequence. In this research {glass fiber}/ {epoxy} / {nano particle} composites (referred to GFR-Nano composites) was fabricated using various nano particles, and their properties in electromagnetic shielding were compared. For visual observation of the nano composite materials, SEM(Scanning Electron Microscope) and TEM(Transmission Electron Microscope) were used. For measurement of electromagnetic shielding, HP8719ES S-parameter Vector Network Analyser System was used on the frequency range from 8 GHz to 12GHz. Among the nano particles, carbon black and Multi-walled Carbon Nano-tube (MWCNT) revealed outstanding electromagnetic shielding. Although silver nano particles (flake and powder) were expected to have effective electromagnetic shielding due to their excellent electric conductivities, test results showed relatively little shielding effect.