Design of mesostructured gamma -Fe(2)O(3)/carbon nanocomposites for electromagnetic wave absorption applications

We propose and demonstrate a scheme to enhance microwave absorption property through mesoporous structure with high regularity. The mesostructured nanocomposites, embedding gamma -Fe(2)O(3) within carbon matrix, exhibit a strong and broadband attenuation of microwave in the frequency range of 0.5-18...

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Bibliographic Details
Published in:Journal of alloys and compounds 2011-08, Vol.509 (32), p.8211-8214
Main Authors: Zhou, Jianhua, He, Jianping, Wang, Tao, Li, Guoxian, Guo, Yunxia, Zhao, Jianqing, Ma, Yiou
Format: Article
Language:English
Subjects:
Attenuation
Belts
Carbon
Frequency ranges
Microwave absorption
Microwaves
Nanocomposites
Reflection
Online Access:Get full text
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Summary:We propose and demonstrate a scheme to enhance microwave absorption property through mesoporous structure with high regularity. The mesostructured nanocomposites, embedding gamma -Fe(2)O(3) within carbon matrix, exhibit a strong and broadband attenuation of microwave in the frequency range of 0.5-18 GHz, mainly due to the belter impedance matching. C-2Fe-900 exhibits strong absorption characteristics with an absorption peak of -32.0dB at 6.4GHz. The absorption peak intensity and position can be adjusted by changing the matching thickness of the coating. Reflection loss below -10dB (i.e., absorption above 90%) is obtained in the frequency range of 1.9-10.7GHz.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2011.05.042