Absorbing/Shielding Property of Graphite-FeSi by Mechanical Milling

Abstract:

Graphite-FeSi absorbents were fabricated by mechanical milling method. The complex permittivity and permeability were measured in frequency 1-4 GHz, and then reflection loss (RL) and shielding effectiveness (SE) were calculated. It was obtained that the graphite was bonded to the surface of FeSi by X-ray diffraction (XRD) patterns and scanning electron microscopy (SEM) images. The permittivity and permeability could be enlarged as graphite added in the milling process. It was attributed to the excellent conductivity of graphite and interactions of the two particles. The graphite-FeSi composites had a better shielding property (maximum 25.93 dB) in 1-4 GHz as well as the absorbing property at 1GHz than FeSi composites.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 166-170
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.166
• Online since: July 2013
• Authors: Yong Gang Xu, Li Ming Yuan, Jun Cai, De Yuan Zhang
• Keywords: Absorbing Materials, FeSi Alloys, Graphite, Mechanical Milling, Shielding Property

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