Multiple-phase carbon-coated FeSn2/Sn nanocomposites for high-frequency microwave absorption

Multiple-phase carbon-coated FeSn2/Sn nanocomposites for high-frequency microwave absorption
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用于高频微波吸收的多相碳包覆 FeSn2/Sn 纳米复合材料

DOI:
10.1016/j.carbon.2015.09.087
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发表时间:
2016
期刊:
影响因子:
10.9
通讯作者:
Qin Gaowu
Qin Gaowu
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhang Xuefeng;Rao Yi;Guo Junjie;Qin Gaowu

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随着微电子器件的快速发展,对高频电磁波吸收材料的研究也越来越多。采用电弧放电法合成了FeSn 2/Sn/Graphite核壳结构的多相纳米粒子,其成分和结构可控,具有典型的隐身特性,这是由于其具有上级电磁波吸收性能。基于传输线理论,我们定量地证明了90%以上的电磁功率可以在9-18 GHz的衰减。实验结果结合Cole-Cole方程和涡流模型的理论计算进一步揭示了这种高性能源于纳米尺度下的洋葱型界面结构和多相分量所产生的理想阻抗匹配。
Rapid expansion in microelectronic devices has prompted increasing research efforts in development of high-frequency electromagnetic wave absorption materials. Multiple-phase FeSn2/Sn/Graphite core–shell nanoparticles synthesized by an arc-discharge method, with controllable components and structures, present a typical cloaking feature aroused from the superior electromagnetic wave absorption. Based on transmission line theory, we prove quantitatively that more than 90% of the electromagnetic power can be attenuated at 9–18 GHz. Experimental results coupled with theory calculations by the Cole–Cole equation and the eddy-current model, further reveal that such high performances are originated from the onion-type interfacial architecture at nanoscale and the desirable impedance match resulting from multiple phase components.
通过阻抗分级定制宽带非对称电磁波吸收:构建类二极管吸收器
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