Microwave absorption capability of microcapsules by coating FeSiAlCr with SiO2
Microwave absorption capability of microcapsules by coating FeSiAlCr with SiO2
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DOI：
10.1088/0022-3727/45/40/405001
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发表时间：
2012-10-10
影响因子：
3.4
通讯作者：
Xu, Hui
中科院分区：
文献类型：
--
作者：
Huang, Weirong;Zhang, Penghua;Xu, Hui
研究了用SiO2包覆FeSiAlCr微胶囊对电磁波的吸收。与FeSiAlCr合金微胶囊相比，微胶囊在较低微波频率下的吸收幅度显著增加。当吸收层厚度为2mm时，2.6 ~ 7.3 GHz范围内所有频率的反射损耗（RL）均超过-10 dB，覆盖了一半s波段和整个c波段。在4.3 GHz时，最大RL可超过-18 dB，而FeSiAlCr合金的RL仅为-4 dB。原因是微胶囊的电导降低，电磁波在微胶囊材料中更容易被吸收。
Electromagnetic wave absorption of microcapsules by coating FeSiAlCr with SiO2 is investigated. The absorption amplitude of the microcapsules is found to increase significantly in the lower frequency of microwave compared with the corpuscles of FeSiAlCr alloy. Reflection loss (RL) exceeding -10 dB can be obtained for all frequencies within 2.6-7.3 GHz, covering half of the S-band, and the whole C-band when the absorber layer thickness is 2 mm. The maximum RL can exceed -18 dB at 4.3 GHz, while the RL is only -4 dB with the corpuscles of FeSiAlCr alloy. The reason is that the microcapsules's conductance is decreased and the absorption of electromagnetic wave in the microcapsule materials is easier.