Electromagnetic and microwave absorbing properties of raw and milled FeSiCr particles

R. B. Yang, W. F. Liang, C. C. Chen, Siu-Tong Choi

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14 Citations (Scopus)

Abstract

FeSiCr alloy (Fe: 90%, Si: 7.9%, and Cr: 2.1%) with pre-milled flaky shape was re-milled in a planetary ball-mill for 30 h. The complex permittivity (ε′-jε′) and permeability (μ′-jμ′) are measured by using the transmission/reflection method for two different aspect ratios of flake-shaped FeSiCr/epoxy composites for 30%, 40%, and 50% weight ratios. Dielectric loss tangent and magnetic loss tangent of re-milled FeSiCr powder show larger electromagnetic wave energy dissipation than those of the raw flaky FeSiCr powder. For 30wt. % of FeSiCr/epoxy absorbers with 2mm thickness, the calculated reflection loss reaches -25dB at 13.0GHz for raw flaky powder, -40dB at 11.4GHz for the re-milled FeSiCr powder with higher aspect ratios.

Original languageEnglish
Article number17B536
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
Publication statusPublished - 2014 May 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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