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Full X-Ku band microwave absorption by Fe(Mn)/Mn7C3/C core/shell/shell structured nanocapsules
Liu, Xianguo1,2,3; Or, Siu Wing1; Ho, S. L.1; Cheung, Chi Chuen1; Leung, Chung Ming1; Han, Zheng2,3; Geng, Dianyu2,3; Zhang, Zhidong2,3
Corresponding AuthorOr, Siu Wing(eeswor@polyu.edu.hk)
2011-09-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume509Issue:37Pages:9071-9075
AbstractNew type of Fe(Mn)/Mn7C3/graphite nanocapsules was prepared by a modified arc discharge technique in ethanol vapor, with Fe(Mn) solid solution nanoparticles as the core, Mn7C3 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 Mn7C3 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.
KeywordCarbon Complex permeability Complex permittivity Electromagnetic wave absorption Nanocapsules Reflection loss
Funding OrganizationHong Kong Polytechnic University ; Ministry of Science and Technology of China
DOI10.1016/j.jallcom.2011.06.031
Indexed BySCI
Language英语
Funding ProjectHong Kong Polytechnic University[G-YX3 V] ; Ministry of Science and Technology of China[2010CB934603]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000293826800019
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:44[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/103709
Collection中国科学院金属研究所
Corresponding AuthorOr, Siu Wing
Affiliation1.Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xianguo,Or, Siu Wing,Ho, S. L.,et al. Full X-Ku band microwave absorption by Fe(Mn)/Mn7C3/C core/shell/shell structured nanocapsules[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2011,509(37):9071-9075.
APA Liu, Xianguo.,Or, Siu Wing.,Ho, S. L..,Cheung, Chi Chuen.,Leung, Chung Ming.,...&Zhang, Zhidong.(2011).Full X-Ku band microwave absorption by Fe(Mn)/Mn7C3/C core/shell/shell structured nanocapsules.JOURNAL OF ALLOYS AND COMPOUNDS,509(37),9071-9075.
MLA Liu, Xianguo,et al."Full X-Ku band microwave absorption by Fe(Mn)/Mn7C3/C core/shell/shell structured nanocapsules".JOURNAL OF ALLOYS AND COMPOUNDS 509.37(2011):9071-9075.
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