Microwave Reflection Characteristics of the Fe/Al2O3 and Fe3Al/Al2O3 Composites

Jian Qiang Wei; Jian Bo Wang; Liang Qiao; Tao Wang; Fa Shen Li

doi:10.4028/www.scientific.net/AMR.160-162.984

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 160-162Microwave Reflection Characteristics of the...

Microwave Reflection Characteristics of the Fe/Al₂O₃ and Fe₃Al/Al₂O₃ Composites

Abstract:

Fe/Al2O3 and Fe3Al/Al2O3 composites were prepared by mechanochemical synthesis. Microwave characteristics were measured in 0.1–18 GHz. A reflection loss (RL) exceeding -10 dB in the frequency range of 1.5-8.5 GHz for an absorber of 6-1.5 mm was achieved for the Fe3Al/Al2O3 composites. Optimal RL of -41 dB was obtained at 2.8 GHz for an absorber thickness of 3.9 mm. The good microwave-absorption properties results from a proper impedance match as a consequence of the insulator Al2O3 around Fe and Fe3Al. Microwave reflection results show that the corresponding frequency and the matching thickness is closely related to the quarter wavelength matching condition and these composites can be attractive candidates for electromagnetic wave absorption materials.

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Periodical:

Advanced Materials Research (Volumes 160-162)

Pages:

984-989

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.160-162.984

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Online since:

November 2010

Authors:

Jian Qiang Wei, Jian Bo Wang, Liang Qiao, Tao Wang, Fa Shen Li

Keywords:

Complex Permeability, Complex Permittivity, Composite Material, Microwave Absorption

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