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Preparation and microwave absorption properties of Ni(Co/Zn/Cu)Fe2O4/SiC@SiO2 composites

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Abstract

Ni(Co/Zn/Cu)Fe2O4/SiC@SiO2, a microwave absorber, was prepared by the sol–gel method. The phase structure and the morphology of the microwave absorbers were characterized by X-Ray Diffraction (XRD) and scanning electron microscopy (SEM), respectively. Laser sizer (LS) and X-ray photoelectron spectroscopy (XPS) analysis show the core–shell structure of SiC@SiO2. Coaxial method was used to measure the microwave absorption properties of the prepared composites in the frequency range of 2–18 GHz. When 70 wt% SiC is wrapped by 30 wt% SiO2, and 50 wt% NiFe2O4 is added into 50 wt% SiC@SiO2, the as-prepared powders are found to have advanced microwave absorption properties with a minimum reflection loss (RL) of −32.26 dB at about 6.08 GHz, and the available bandwidth is approximately 2.1 GHz when the RL is below −10 dB.

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Acknowledgments

This study was financially supported by the Military Project of the Ministry of National Defense of China (No. JPPT-125-2-168).

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Authors and Affiliations

  1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China

    Peng Wang, Ping-An Liu & Sheng Ye

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  1. Peng Wang
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  2. Ping-An Liu
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Correspondence to Ping-An Liu.

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Wang, P., Liu, PA. & Ye, S. Preparation and microwave absorption properties of Ni(Co/Zn/Cu)Fe2O4/SiC@SiO2 composites. Rare Met. 38, 59–63 (2019). https://doi.org/10.1007/s12598-016-0752-1

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  • DOI: https://doi.org/10.1007/s12598-016-0752-1

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