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Comparison of Electromagnetic-wave Shielding Effect in Glass Fiber Reinforced Nano Composites  

Jung Woo-Kyun (서울대학교 기계항공공학부 대학원)
Won Myung-Sik (국방과학연구소)
Ahn Sung-Hoon (서울대학교 기계항공공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.10, 2005 , pp. 121-128 More about this Journal
Abstract
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 materials having special absorptive properties and structural characteristics such as stacking sequence. Recently researchers studied the electromagnetic properties of nano size particles. In this research {glass fiber}/{epoxy}/{nano particle} composites(GFR-Nano composites) was fabricated using various nano particles, and their properties in electromagnetic shielding were compared. For the visual observation of the nano composite materials, SEM(Scanning Electron Microscope) and TEM(Transmission Electron Microscope) were used. For the measurement of electromagnetic shielding, HP8719ES S-parameter Vector Network Analyser System was used on the frequency range of 8 GHz${\~}$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 little shielding characteristics.
Keywords
Electromagnetic-wave Shielding; Glass Fiber Reinforced Composite Material; Nano composites;
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Times Cited By KSCI : 1  (Citation Analysis)
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