反射损耗
材料科学
介电损耗
电介质
复合材料
衰减
碳热反应
吸收(声学)
雷达截面
电磁辐射
雷达
光电子学
复合数
光学
电信
计算机科学
碳化物
物理
作者
Zhongning Xiang,Bingkun Xu,Qinchuan He,Yudong Wang,Xu-Cheng Yin
标识
DOI:10.1016/j.cej.2022.141198
摘要
It is confirmed that the multi-component strategy of combining magnetic and dielectric components with different dielectric properties is still challenging to achieve efficient electromagnetic wave (EMW) absorbing (strong absorption and a broad effective absorption bandwidth at a low filling level). Herein, a magnetic/dielectric multi-component of Fe3Si/SiC composites is constructed via an in-situ carbothermal reduction strategy. The heterogeneous magnetic/dielectric multi-component benefit to superior EMW absorption performance through forming multiple polarizations, magnetic loss, and dielectric loss effects. Especially, when the carbothermal reduction temperature is 1400 °C, the prepared Fe3Si/SiC composites exhibit the best EMW absorption performance at a very low filler loading of 10 wt%, with a minimum reflection loss (RLmin) of −61.67 dB and an effective bandwidth (EAB) for RLmin < −10 dB reaches 6.96 GHz. Additionally, the radar cross section (RCS) can be reduced to 17.08 dB m2 and the RCS value is completely lower than −5.98 dB m2 in the range of −60° to 60°, which signified the high attenuation performance of radar wave. This work guides to design an efficient EMW absorber with lightweight and strong absorption.
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