Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 32, Pages 8211-8214Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.05.042
Keywords
Mesostructure; Microwave absorption; Impedance matching; Magnetic properties
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Funding
- Natural Science Foundation [50871053]
- Aeronautical Science Foundation of China [2007ZF52061]
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We propose and demonstrate a scheme to enhance microwave absorption property through mesoporous structure with high regularity. The mesostructured nanocomposites, embedding gamma-Fe2O3 within carbon matrix, exhibit a strong and broadband attenuation of microwave in the frequency range of 0.5-18 GHz, mainly due to the better impedance matching. C-2Fe-900 exhibits strong absorption characteristics with an absorption peak of -32.0 dB at 6.4 GHz. The absorption peak intensity and position can be adjusted by changing the matching thickness of the coating. Reflection loss below -10 dB (i.e., absorption above 90%) is obtained in the frequency range of 1.9-10.7 GHz. (C) 2011 Elsevier B. V. All rights reserved.
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