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 language | English |
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Article number | 17B536 |
Journal | Journal of Applied Physics |
Volume | 115 |
Issue number | 17 |
DOIs | |
Publication status | Published - 2014 May 7 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy