Magnetic-dielectric composites attract numerous attentions for good microwave absorption performances based on magnetic-dielectric loss mechanism and tunable electromagnetic parameters. Fe/carbon fibers are prepared through carbonization of Fe doped polyaniline nanotubes, in which Fe nanoparticles are embedded in carbon fibers. The introduction of Fe nanoparticles results in good electromagnetic impedance and proper quarter-wavelength cancellation induced, which ensure that microwave penetrate composites to the great extend and is consumed as much as possible, leading to enhanced microwave absorption performance. The minimal reflection loss of Fe/carbon fibers composites starts being less than −10 dB from 1.7 mm and is up to −44.09 dB at 6.62 GHz and 4.1 mm and the effective bandwidth reaches 6.0 GHz with 2.4 mm.

基于磁电介质损耗机制和可调电磁参数的磁电介质复合材料因其良好的微波吸收性能而备受关注。Fe/碳纤维是通过Fe掺杂的聚苯胺纳米管的碳化制备的，其中Fe纳米颗粒嵌入碳纤维中。Fe纳米粒子的引入导致良好的电磁阻抗和适当的四分之一波长抵消，这确保了微波在很大程度上穿透复合材料并尽可能多地消耗，从而增强了微波吸收性能。Fe/碳纤维复合材料的最小反射损耗从 1.7 mm 开始小于 -10 dB，在 6.62 GHz 和 4.1 mm 时高达 -44.09 dB，有效带宽在 2.4 mm 时达到 6.0 GHz。