Graphite/epoxy-coated flaky FeSiCr powders with enhanced microwave absorption

Graphite/epoxy-coated flaky FeSiCr powders with enhanced 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 per...

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Bibliographic Details
Main Authors: Zhang, Haonan, Zhong, Xichun, Hu, Jinwen, He, Na, Xu, Hanxing, Liao, Xuefeng, Zhou, Qing, Liu, Zhongwu, Ramanujan, Raju V.
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2024
Subjects:
Engineering
Carbon materials
Microwave absorption
Online Access:https://hdl.handle.net/10356/174034
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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