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Microwave absorption properties of double-layer absorbers based on spindle magnetite nanoparticles and flower-like copper sulfide microspheres

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Abstract

In this work, the spindle magnetite nanoparticles (SMNPs) and flower-like copper sulfide microspheres (FCSMSs) were synthesized via hydrothermal method. The structures, chemical composition and morphologies of samples were analyzed and characterized in detail. The microwave absorption properties of single-layer and double-layer absorbers were investigated based on the electromagnetic transmission line theory in the frequency range from 2 to 18 GHz. The results show that the double-layer absorbers consisting of FCSMSs as matching layer and SMNPs as absorbing layer display superior microwave absorbing performance compared to the single-layer ones due to the proper combination of magnetic loss of SMNPs and dielectric loss of FCSMSs, and the improved impedance matching characteristics. When the thicknesses of the absorbing layer and the matching layer are 1.6 and 0.4 mm, respectively, the minimum reflection loss reaches − 74.3 dB at 10.9 GHz, and the efficient absorption bandwidth is up to 5.34 GHz (8.46–13.8 GHz). The optimal SMNPs/FCSMSs double-layer absorbers can become a novel microwave absorption material with strong-absorption and broad-band.

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Authors and Affiliations

  1. Department of Applied Chemistry, School of Natural and Applied Science, Northwestern Polytechnical University, Xi’an, 710072, China

    Sida Liu, Lindong Li, Shuirong Zheng & Shuhua Qi

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  1. Sida Liu
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  2. Lindong Li
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  4. Shuhua Qi
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Correspondence to Shuhua Qi.

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Liu, S., Li, L., Zheng, S. et al. Microwave absorption properties of double-layer absorbers based on spindle magnetite nanoparticles and flower-like copper sulfide microspheres. J Mater Sci: Mater Electron 29, 8978–8988 (2018). https://doi.org/10.1007/s10854-018-8922-6

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