Graphite/Epoxy-Coated Flaky FeSiCr Powders with Enhanced Microwave Absorption

Flake-shaped FeSiCr (FFSC) material is expected to be a promising microwave absorbent due its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the electromagnetic parameters energy loss can tuned improve performance of FFSC. A facile solution-blending method was deployed prepare graphite- epoxy resin-encapsulated FFSC (FFSC@G/E) powders with core–shell structure. FFSC@G2000/E showed in X band (8–12 GHz), minimum reflection (RLmin) −42.77 dB at thickness 3 mm maximum effective absorption bandwidth (EABmax, RL < −10 dB) that reached 4.55 GHz 2.7 mm. This work provides route for production novel high-performance absorbers.