Novel and Efficient Electromagnetic Wave Absorption of SiBCN(Fe) Nanofibers
Colloids and surfaces A, Physicochemical and engineering aspects(2023)
摘要
In this work, novel and efficient SiBCN(Fe) nanofibers were successfully prepared by electrostatic spinning and polymer-derived ceramic (PDCs) methods, and their electromagnetic wave (EMW) absorption properties were investigated after pyrolysis at 1100-1500 degrees C. Notably, SiBCN(Fe) nanofibers exhibit the best EMW absorption performance after pyrolysis at 1400 degrees C, with a minimum reflection loss (RLmin) of -72.87 dB at 3.6 GHz and an effective absorption bandwidth (EAB, RL <= -10 dB) of 4.34 GHz at 1.44 mm. Its excellent EMW absorption performance is attributed to its fiber structure, which facilitates the multi-level reflection and scattering of EMW. Meanwhile, the doping of Fe facilitates the in-situ generation of substances such as Fe3Si, which can impart SiBCN(Fe) nanofibers with magnetic loss and perfect impedance matching performance. The simulated radar cross-section (RCS) results show that the optimized SiBCN(Fe) nanofibers can effectively achieve the attenuation of EMW in a practical environment. Compared with many previously reported magnetic hybrid composites, SiBCN(Fe) nanofibers exhibit excellent electromagnetic absorption properties with a simpler preparation process, which have the potential to be used as lightweight, ultra-strong radar-absorbing materials.
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关键词
Electrospinning,Polymer-derived ceramics,SiBCN(Fe) nanofibers,Electromagnetic wave absorbing properties
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