Graphite/Epoxy-Coated Flaky FeSiCr Powders with Enhanced Microwave Absorption
Haonan Zhang,
Xichun Zhong,
Jinwen Hu,
Na He,
Hanxing Xu,
Xuefeng Liao,
Qing Zhou,
Zhongwu Liu,
Raju V. Ramanujan
Affiliations
Haonan Zhang
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Xichun Zhong
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Jinwen Hu
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Na He
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Hanxing Xu
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Xuefeng Liao
Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China
Qing Zhou
Guangdong Provincial Key Laboratory of Rare Earth Development and Application, Institute of Resources Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510650, China
Zhongwu Liu
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
Raju V. Ramanujan
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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@G2000/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 (EABmax, 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.
