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

作者：Zhang, Haonan; Zhong, Xichun^*; Hu, Jinwen; He, Na; Xu, Hanxing; Liao, Xuefeng; Zhou, Qing; Liu, Zhongwu; Ramanujan, Raju V.

来源：Metals, 2023, 13(9): 1611.

DOI：10.3390/met13091611

• fake-shaped FeSiCr material
• carbon materials
• coating
• microwave absorption

Flake-shaped FeSiCr (FFSC) material is expected to be a promising microwave absorbent due to its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the electromagnetic parameters and energy loss can be tuned to improve the performance of FFSC. A facile solution-blending method was deployed to prepare graphite- and epoxy resin-encapsulated FFSC (FFSC@G/E) powders with a core-shell structure. FFSC@G(2000)/E showed excellent performance in the X band (8-12 GHz), a minimum reflection loss (RLmin) of -42.77 dB at a thickness of 3 mm and a maximum effective absorption bandwidth (EAB(max), RL < -10 dB) that reached 4.55 GHz at a thickness of 2.7 mm. This work provides a route for the production of novel high-performance microwave absorbers.

• 单位
  南阳理工学院