Abstract
To enhance the microwave absorption performance of silicon carbide nanowires (SiCNWs), SiO2 nanoshells with a thickness of approximately 2 nm and Fe3O4 nanoparticles were grown on the surface of SiCNWs to form SiC@SiO2@Fe3O4 hybrids. The microwave absorption performance of the SiC@SiO2@Fe3O4 hybrids with different thicknesses was investigated in the frequency range from 2 to 18 GHz using a free-space antenna-based system. The results indicate that SiC@SiO2@Fe3O4 hybrids exhibit improved microwave absorption. In particular, in the case of an SiC@SiO2 to iron(III) acetylacetonate mass ratio of 1:3, the microwave absorption with an absorber of 2-mm thickness exhibited a minimum reflection loss of −39.58 dB at 12.24 GHz. With respect to the enhanced microwave absorption mechanism, the Fe3O4 nanoparticles coated on SiC@SiO2 nanowires are proposed to balance the permeability and permittivity of the materials, contributing to the microwave attenuation.
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This work was financially supported by the National Science Fund for Excellent Young Scholars of China (No. 51522402), the National Natural Science Foundation of China (Nos. 51572019 and U1460201), and the Fundamental Research Funds for the Central Universities (No. FRF-TP-15-006C1).
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Zhou, P., Chen, Jh., Liu, M. et al. Microwave absorption properties of SiC@SiO2@Fe3O4 hybrids in the 2–18 GHz range. Int J Miner Metall Mater 24, 804–813 (2017). https://doi.org/10.1007/s12613-017-1464-8
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DOI: https://doi.org/10.1007/s12613-017-1464-8