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Electromagnetic and microwave absorbing properties of FeCoB powder composites

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Abstract

The electromagnetic and microwave absorbing properties of FeCoB powder composites prepared by single-roller melt-spinning and mechanical milling processes were investigated in this paper. The result indicates that the flake-like powders are obtained. As milling time increases, the flake-like powder particles tend to agglomerate, causing the flake-like powders decrease gradually. The milling time plays an important role in the electromagnetic parameters which relates to the shape and size of the powder particles. The calculation shows that the sample milled for 6 h could achieve an optimal reflection loss of −11.5 dB at 5.8 GHz, with mass fraction of 83 % and a matching thickness of 1.8 mm. The result also indicates that the microwave absorbing properties of the FeCoB powder composites are adjustable by changing their thickness, and can be applied as a thinner microwave absorbing material in the range of 2–8 GHz.

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Acknowledgments

This work was financially supported by the National Hi-tech R&D Project Supporting Programs Funded by Ministry of Science & Technology of China (No. 2012AA063202), the National Natural Science Foundation of China (Nos. 50972013, 50802008, and 51004011), the National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science & Technology of China (Nos. 2012BAC02B01, 2012BAC12B05, 2011BAE13B07, and 2011BAC10B02), and the Guangdong Province & Ministry of Education Industry-Study-Research United Project (No. 2009A090100017).

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Authors and Affiliations

  1. Advanced Material and Technology Institute, University of Science and Technology Beijing, Beijing, 100083, China

    Shen-Gen Zhang, Hang-Xin Zhu, Jian-Jun Tian, De-An Pan, Bo Liu & Yan-Tao Kang

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  1. Shen-Gen Zhang
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  2. Hang-Xin Zhu
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Correspondence to Shen-Gen Zhang.

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Zhang, SG., Zhu, HX., Tian, JJ. et al. Electromagnetic and microwave absorbing properties of FeCoB powder composites. Rare Met. 32, 402–407 (2013). https://doi.org/10.1007/s12598-013-0115-0

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