Electrospinning of FeNiCo/carbon nanofibers: a new paradigm for lightweight microwave absorbers

With the rapid development of modern electronic technology, the demand for high-performance microwave absorption materials has increased dramatically. In order to meet this demand, the electrospinning of FeNiCo/carbon nanofiber (FeNiCo/CNF) composites with excellent microwave absorption properties was developed, and their potential as high frequency microwave absorption materials was evaluated. Experiment showed that FeNiCo/CNFs achieve a minimum reflection loss (RLmin) of −55.5 dB with a matching thickness of only 1.6 mm. Microstructure analysis and electromagnetic parameter testing showed that the excellent microwave absorbing properties were mainly due to the combined effect of the network structure of carbon nanofibers and the FeNiCo alloy. This interaction promotes multiple reflections and the efficient absorption of microwaves. Computer simulation also showed that the FeNiCo/CNF composites produce an excellent radar cross-section reduction in typical radar operating frequency bands, which validates their potential application in stealth technology. This is a new concept in the development of high-performance microwave absorption materials.