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Preparation, characterization and microwave absorption properties of bamboo-like β-SiC nanowhiskers by molten-salt synthesis

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Abstract

Bamboo-like and cubic single-crystalline silicon carbide nanowhiskers (SiCNWs) were synthesized using multiwalled carbon nanotube via a process of calcination in the molten-salt circumstance. The system was heated to 1,250 °C and maintained for 6 h in argon atmosphere, and obtained the sample. The as-prepared sample was characterized by a series of techniques. Especially, the microwave absorption properties of SiCNWs/paraffin composites (30 wt%) were investigated over 2–14 GHz. The result shows the optimal reflection loss can reach −48.1 dB at 13.52 GHz when the thickness of the match is only 1.9 mm. The excellent microwave absorption properties of the SiCNWs/paraffin composites due to the dielectric loss would make it as a promising candidate for the application of absorbing materials. In addition, a possible growth mechanism of SiCNWs was also discussed.

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Acknowledgments

This work was financially supported by the National Nature Science Foundation of China (Nos. 50771082 and 60776822), and Graduate Starting Seed Fund of Northwestern Polytechnical University (No. Z2014070).

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Authors and Affiliations

  1. Department of Applied Physics, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Wenlong Hu, Liuding Wang, Qiaofeng Wu & Hongjing Wu

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  1. Wenlong Hu
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  2. Liuding Wang
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  3. Qiaofeng Wu
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  4. Hongjing Wu
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Correspondence to Hongjing Wu.

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Hu, W., Wang, L., Wu, Q. et al. Preparation, characterization and microwave absorption properties of bamboo-like β-SiC nanowhiskers by molten-salt synthesis. J Mater Sci: Mater Electron 25, 5302–5308 (2014). https://doi.org/10.1007/s10854-014-2305-4

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  • DOI: https://doi.org/10.1007/s10854-014-2305-4

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