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Synthesis and microwave absorbing properties of Ni–Cu ferrite/MWCNTs composites

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Abstract

The electromagnetic and microwave absorbing properties of the nickel–copper (Ni–Cu) nanoferrites and multi-walled carbon nanotubes (MWCNTs) filled into epoxy resin were investigated in the X band (8.2–12.4 GHz), and the Ni–Cu nanoferrites were synthesized using auto-combustion method. The Ni–Cu ferrite annealing temperature was chosen at 600 °C to obtain the good magnetic properties. When the MWCNTs were added, the values of complex permittivity were enhanced by improving the interfacial polarization. The magnetic properties may be attributed to increase the concentration of Fe3+ ions in octahedral sites, which in turn induces the magnetization of the Ni–Cu ferrite. By changing the MWCNTs content, the optimizing reflection loss bandwidth below −10 dB can reach 3.2 GHz with the absorber thickness of 2.3 mm.

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Acknowledgments

This work was financed by the Chinese National Natural Science Foundation of China (Grant No. 51072165), and the fund of State Key Laboratory of Solidification Processing in Northwestern Polytechnical University (No. KP201307).

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Authors and Affiliations

  1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, Shaanxi, China

    Hongyu Wang, Dongmei Zhu, Wancheng Zhou & Fa Luo

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  1. Hongyu Wang
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  2. Dongmei Zhu
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  3. Wancheng Zhou
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  4. Fa Luo
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Correspondence to Hongyu Wang.

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Wang, H., Zhu, D., Zhou, W. et al. Synthesis and microwave absorbing properties of Ni–Cu ferrite/MWCNTs composites. J Mater Sci: Mater Electron 26, 7698–7704 (2015). https://doi.org/10.1007/s10854-015-3411-7

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  • DOI: https://doi.org/10.1007/s10854-015-3411-7

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