ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The carbon-coated Fe(C), Co(C) and Ni(C) nanocapsules were prepared by a modifiedarc-discharge method in methane atmosphere. The nanocapsule powder, 50 % by weight, was mixeduniformly with paraffin wax to form measurement samples. Their electromagnetic (EM) wavereflection loss of the composite samples was calculated using the relative complex permeability andpermittivity measured in microwave frequency range of 2-18 GHz. It is indicated that Fe(C), Co(C)and Ni(C) nanocapsules show the broadband characteristics with strong absorption from 2 to 18 GHzfor a coating thickness of about 2-3 mm. The excellent EM wave absorption properties are mainlyattributed to the proper electromagnetic match in microstructure, strong natural resonance as well asmulti-polarization mechanisms, etc. As an inspiration, we found this kind of nanocapsules with adielectric shell and a ferromagnetic core are very promising for new EM wave absorption materials
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1097.pdf
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