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HomeMaterials Science ForumMaterials Science Forum Vol. 914Structure and Microwave Absorption Properties of...

Structure and Microwave Absorption Properties of Ho-Fe-Si Alloys

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Abstract:

The Ho₂Fe₁₇_-xSi_x(x=0.0, 0.1, 0.2, 0.3) alloys were prepared by arc melting and high energy ball milling method. The influence of the Si substitution on phase structure, morphology and electromagnetic parameters were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and vector network analyzer (VNA), respectively. The results show that the Ho-Fe-Si particles are flaky after the ball milling. The minimum absorption peak frequency shifts towards a lower frequency region with the increasing of Si content. The minimum RL of Ho₂Fe_16.7Si_0.3 reaches-42.96 dB at 9.76 GHz, and the frequency bandwidth of R<-10 dB reaches about 2.64 GHz with the best matching condition d=1.6 mm. The reflection loss with the thickness ranging of 1.2-3.0 mm could reach-10 dB, which indicates the particles be considered as the promising microwave absorbing materials with a good absorption properties.

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Functional Materials Technology and Industry Forum IX

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Periodical:

Materials Science Forum (Volume 914)

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117-123

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.914.117

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Online since:

February 2018

Authors:

Jia Liang Luo, Shun Kang Pan*, Li Chun Cheng, Pei Hao Lin, Yu He, Jun Qing Chang

Keywords:

Ball Milling, Electromagnetic Parameters, Ho₂F_17-xSi_x Alloys, Microwave Absorbing Properties

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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