材料科学
反射损耗
微波食品加热
陶瓷
复合数
吸收(声学)
极化(电化学)
阻抗匹配
复合材料
电磁辐射
电介质
电阻抗
光电子学
光学
物理化学
工程类
物理
化学
电气工程
量子力学
作者
Yurun Feng,Xue Guo,Hongyu Gong,Yujun Zhang,Xiao Lin
标识
DOI:10.1016/j.ceramint.2020.09.244
摘要
The Fe/C/SiCN composite ceramics were synthesized by polymer-derived method to obtain the integration of structure and functions. The electromagnetic waves (EMW) absorption properties at X and Ku bands were investigated. The addition of nano-sized Fe particles improved the magnetic loss and impedance matching, and the carbon nanotubes generated by the iron in-situ catalysis increased the internal relaxation polarization and interfacial polarization, which together improved the EMW absorption properties significantly. In particular, the Fe/C/SiCN-9 showed the optimum reflection loss (RL) of −31.06 dB at 10.03 GHz with an effective absorption bandwidth (EAB, RL < −10 dB) of 3.03 GHz at 2.51 mm, indicating the excellent EMW absorption properties of Fe/C/SiCN composite ceramics.
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