Carbon-based nanomaterials are widely employed for microwave absorption. However, reasonable methods to enhance microwave absorption capacity remain worth exploring. Herein, carbon nanofibers (CNFs) modified by silicon carbide and metal silicide (SiC/Fe₃Si/C) were fabricated through electrospinning and high-temperature pyrolysis processes, and their phase composition, micro-morphology, micro-structure, and magnetic characteristics evaluated. The composite nanofibers (SiC/Fe₃Si/CNFs) exhibited excellent microwave absorption, with minimum reflection loss (RL_min) values of −41.6 dB at 12.8 GHz and a matching thickness of 4.5 mm. Further, the maximum effective absorption bandwidth (EAB, RL<−10 dB) of the as-synthesized sample is 11.5 GHz with a matching thickness of 5 mm. These novel carbide and intermetallic compounds loaded CNFs are remarkable candidates for lightweight, tunable, and efficient microwave absorbers.

碳基纳米材料被广泛用于微波吸收。然而，提高微波吸收能力的合理方法仍然值得探索。在此，通过静电纺丝和高温热解工艺制备了碳化硅和金属硅化物（SiC/Fe ₃ Si/C ）改性的碳纳米纤维（CNFs），并对其相组成、微观形貌、微观结构和磁特性进行了研究。评估。复合纳米纤维 (SiC/Fe ₃ Si/CNFs) 表现出优异的微波吸收性，最小的反射损耗 (RL _min) 值在 12.8 GHz 时为 −41.6 dB，匹配厚度为 4.5 mm。此外，合成样品的最大有效吸收带宽（EAB，RL <-10 dB）为 11.5 GHz，匹配厚度为 5 mm。这些新型碳化物和金属间化合物负载的 CNF 是轻质、可调和高效微波吸收剂的卓越候选者。