材料科学
反射损耗
多孔性
吸收(声学)
雷达截面
介电损耗
电介质
复合材料
光电子学
散射
复合数
光学
物理
作者
Bingkun Xu,Qinchuan He,Yiqun Wang,Xuemin Yin
标识
DOI:10.1016/j.ceramint.2023.03.262
摘要
Multi-component and a large number of non-homogeneous interface absorbers have been proven to be the preferred choice of electromagnetic wave (EMW) absorption materials. Herein, hollow porous Ni@SiC nanospheres (HPNS) were successfully constructed by combining a carbothermal reduction preparation strategy and subsequent electroless plating process. The heterogeneous dielectric/magnetic multi-component benefit to excellent EMW absorption properties through forming multiple polarizations, dielectric loss, and magnetic loss effects. Particularly, the HPNS at the optimal ratio with a low filler loading of 20 wt% exhibits the minimum reflection loss (RLmin) value of −62.39 dB at 13.28 GHz and the maximum effective absorption bandwidth (EABmax) is up to 5.36 GHz (12.64–18 GHz), and the corresponding thin matching thicknesses are 1.96 mm and 1.80 mm, respectively. Furthermore, the maximum radar cross section (RCS) reduction of HPNS over PEC reaches 26.02 dB m2 (1.96 mm) under far-field conditions, which means that the prepared HPNS is extraordinarily promising for practical applications. This work guides the preparation of high-performance EMW absorbers as well as radar stealth materials.
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