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http://dx.doi.org/10.4283/JKMS.2010.20.4.143

Effects of Sheet Thickness on Electromagnetic Wave Absorption Characteristics in FeSiCr/Polymer Composite Sheets  

Noh, Tae-Hwan (School of Materials Science & Engineering, Andong National University)
Kim, Ju-Beom (School of Materials Science & Engineering, Andong National University)
Publication Information
Journal of the Korean Magnetics Society / v.20, no.4, 2010 , pp. 143-148 More about this Journal
Abstract
This study examined the effects of sheet thickness on electromagnetic wave absorption characteristics and internal microstructure in 92.6%Fe-6.5%Si-0.9%Cr (wt%) alloy flakes/polymer composite sheets available for quasi-microwave band. The composite sheets with the thickness of 0.3, 0.4 and 0.5 mm were prepared by tape casting. A significant decrease in transmission parameter $S_{21}$ and a large increase in power loss were observed for the thick composite sheet in the frequency range of 1~5 GHz. However the permeability properties were not affected by thickness variation, while the imaginary part of complex permittivity increased with the increase of sheet thickness at 1~5 GHz. The enhanced electromagnetic wave absorption characteristics in the thicker composite sheets was attributed to the changed microstructure and the higher dielectric loss.
Keywords
electromagnetic wave absorption; FeSiCr flakes; composite sheets; sheet thickness; complex permittivity;
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Times Cited By KSCI : 2  (Citation Analysis)
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