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Improved microwave absorption properties of core–shell type Ni@SiC nanocomposites

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Abstract

SiC coated Ni nanocomposites were fabricated by a facile arc-discharge method. XRD, HRTEM and XPS technologies indicate that as-prepared Ni@SiC nanocomposites consist of the Ni nanoparticles core and shells composed of crystalline SiC together with a few C/SiOx. The Ni@SiC nanocomposites absorbent present excellent microwave absorption in C–Ku band. The strongest reflection loss (RL) of Ni@SiC-parrafin composites achieve −42.1 dB at 11.2 GHz with its absorption bandwidth below −10 dB covering the whole X band at a matching thickness of 2.88 mm. Moreover, the RL values of Ni@SiC nanocomposites absorbent below −10 dB are about 1.6–2.5 times of those of the Ni nanoparticles absorbent at absorbent thicknesses of 1.4–5.5 mm. Furthermore, the maximum absorption bandwidth exceeding −10 dB is about 7.2 (6.2–13.4 GHz) for Ni@SiC-paraffin composites at a relatively thin matching thickness of 3.0 mm, covering the almost half C band and the whole X band.

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Acknowledgements

This study was supported by the Science technology program of Shen Yang (F14-231-1-25) and the National Natural Science Foundation of China (21571132).

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  1. Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, 110870, People’s Republic of China

    Zhi-Jie Li, Gui-Mei Shi & Qian Zhao

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  1. Zhi-Jie Li
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Correspondence to Gui-Mei Shi.

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Li, ZJ., Shi, GM. & Zhao, Q. Improved microwave absorption properties of core–shell type Ni@SiC nanocomposites. J Mater Sci: Mater Electron 28, 5887–5897 (2017). https://doi.org/10.1007/s10854-016-6262-y

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