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Synthesis and Micro-Wave Absorption Properties of BiFeO3 Coated Fe Nanocapsules

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Abstract:

BiFeO3 coated ferromagnetic Fe nanocapsules is synthesized by arc-discharging method. Typical HRTEM images show that the nanocapsules form in a core-shell structure. X-ray photoelectron spectrum (XPS) and X-ray diffraction (XRD) reveal that the core is ferromagnetic Fe, while the shell is BiFeO3/Bi2Fe4O9.The reflection loss R of less than -10 dB was obtained for the whole frequency within the 2-18GHz range by choosing an appropriate layer thickness between 1.0mm and 7.0mm. An optimal reflection loss of -21.5 dB was reached at 10.6 GHz with an absorber thickness of 2.0mm. It is worth noticing that the BiFeO3 coated Fe nanocapsules have two absorption peaks below -10 dB at each thickness layer ranging from 4.0nm to 7.0nm, which means the composites nanocapsules absorber simultaneously are able to absorb microwaves in different band of several GHz.

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Periodical:

Advanced Materials Research (Volumes 712-715)

Pages:

229-232

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.712-715.229

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Online since:

June 2013

Authors:

Gui Mei Shi*, Da Wei Lu, Yan Zhang

Keywords:

Arc-Discharge, BiFeO3 Coated Fe Nanocapsule, Micro-Wave Absorption Property

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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