Journal
INTEGRATED FERROELECTRICS
Volume 152, Issue 1, Pages 137-143Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10584587.2014.902258
Keywords
microwave absorption; thermal oxidation synthesis; Composite materials; impedance match
Funding
- National Nature Science Foundation of China [51002156, 11274314, 11104098]
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The urchin-like structure of Fe/alpha-Fe2O3 composite has been prepared by a simple thermal oxidation method. The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). The microwave absorption property of the Fe/alpha-Fe2O3 composite was measured by vector network analysis (VNA). The excellent microwave absorption property of Fe/alpha-Fe2O3 composite was achieved due to the relatively low permittivity and unique isotropic antenna-like morphology. When the matching thickness is 2.5mm, the optimal reflection loss of Fe/alpha-Fe2O3 reaches about -41.2dB at 5.2GHz. A possible mechanism of the improved microwave absorption properties of the composites was discussed.
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