Full X-Ku band microwave absorption by Fe(Mn)/Mn(7)C(3)/C core/shell/shell structured nanocapsules

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	Full X-Ku band microwave absorption by Fe(Mn)/Mn(7)C(3)/C core/shell/shell structured nanocapsules
	X. G. Liu; S. W. Or; S. L. Ho; C. C. Cheung; C. M. Leung; Z. Han; D. Y. Geng; Z. D. Zhang
	2011
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	509 期号:37 页码:9071-9075
摘要	New type of Fe(Mn)/Mn(7)C(3)/graphite nanocapsules was prepared by a modified arc discharge technique in ethanol vapor, with Fe(Mn) solid solution nanoparticles as the core, Mn(7)C(3) as the inner shell, and graphite as the outer shell. The Cole-Cole semicircle approach was adopted to explain the ternary dielectric resonance, due to a cooperative consequence of the core/shell/shell interfaces and the dielectric Mn(7)C(3) and C shells. A remarkable increase in the anisotropy energy led to a shift in the natural resonance frequency to 6.6 GHz. Dielectric losses come from the ternary dielectric resonance while magnetic losses were from the magnetic natural resonance. An optimal reflection loss (RL) of -142.1 dB was observed at 12 GHz for 5.0 mm thickness layer. RL exceeding -10 dB was obtained at 6.6-18 GHz for 1.4 mm thickness, covering the whole X band (8-12 GHz), Ku band (12-18 GHz), and some of C band (6.6-8.0 GHz). RL exceeding -20 dB was found at 6-10.6 GHz for 2.2 mm thickness. (C) 2011 Elsevier B. V. All rights reserved.
部门归属	[liu, xianguo; or, siu wing; ho, s. l.; cheung, chi chuen; leung, chung ming] hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china. [liu, xianguo; han, zheng; geng, dianyu; zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [liu, xianguo; han, zheng; geng, dianyu; zhang, zhidong] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;or, sw (reprint author), hong kong polytech univ, dept elect engn, kowloon, hong kong, peoples r china;eeswor@polyu.edu.hk
关键词	Carbon Complex Permeability Complex Permittivity Electromagnetic Wave Absorption Nanocapsules Reflection Loss Nanocomposites Nanoparticles Composites Iron Nanotubes Nanorods
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30545
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. G. Liu,S. W. Or,S. L. Ho,et al. Full X-Ku band microwave absorption by Fe(Mn)/Mn(7)C(3)/C core/shell/shell structured nanocapsules[J]. Journal of Alloys and Compounds,2011,509(37):9071-9075.
APA	X. G. Liu.,S. W. Or.,S. L. Ho.,C. C. Cheung.,C. M. Leung.,...&Z. D. Zhang.(2011).Full X-Ku band microwave absorption by Fe(Mn)/Mn(7)C(3)/C core/shell/shell structured nanocapsules.Journal of Alloys and Compounds,509(37),9071-9075.
MLA	X. G. Liu,et al."Full X-Ku band microwave absorption by Fe(Mn)/Mn(7)C(3)/C core/shell/shell structured nanocapsules".Journal of Alloys and Compounds 509.37(2011):9071-9075.