Microwave property of micron and sub-micron Fe90Al10 flakes fabricated via ball milling and jet milling routes

摘要: Abstract Fe 90 Al 10 flakes with micron- and submicron-sizes were fabricated via different milling routes. Traditional wet ball-milling process pure ethanol as additive was performed to prepare micro-sized Fe/Al flakes. With increasing wet-milling time, the flake size increases. For submicron-flakes, Micron-Master Jet Pulverizer (so called jet mill) employed. The results reveal that submicron-flakes an average lateral of 500 nm could be obtained through combination ball milling. Microwave performance sizes further studied. complex permittivity permeability measured by dispersing as-prepared into epoxy resin a powder-to-epoxy volume ratio 1:10. showed flaky particles possess obvious advantage over quasi-spherical ones on microwave property. theoretical calculation reflection loss (RL) also investigated in range 0.1–18 GHz. show composite including 50 μm shows strongest peak. optimal thickness 3.1 mm RL value reached −34 dB at frequency 7.6 GHz. Compared micron-flakes, resonance submicron shifted toward higher band, which is probably due reduction skin effect because smaller size. In our study effect, peak decrease for containing And 1.9 mm 14.2 GHz exceeding −10 dB between 12.2 16.8 GHz. have potential making lightweight broad-band absorbers applied high range.