Preparation and electromagnetic properties of graphene-supported Ni0.8Zn0.2Ce0.06Fe1.94O4 nanocomposite

The graphene supported Ni0.8Zn0.2Ce0.06Fe1.94O4 nanocomposite was prepared by a deoxidation technique. The structure, morphology and electromagnetic properties of the composites were characterized by various instruments. The Ni0.8Zn0.2Ce0.06Fe1.94O4 powders could be distributed on the graphene sheets (GNS). The as-prepared Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite exhibits a saturated magnetization of 50.42 emu/g. The electromagnetic parameters of Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite were investigated in the 2–18 GHz range. The composite Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS exhibits better microwave absorbing properties than Ni0.8Zn0.2Ce0.06Fe1.94O4. The minimum loss value of Ni0.8Zn0.2Ce0.06Fe1.94O4/GNS nanocomposite is − 37.4 dB at 12.3 GHz and a broad peak with a bandwidth lower than − 10 dB is at 10.7–15.2 GHz. These results show that the introduction of GNS can increase the complex permittivities and has an important effect on the improvement of microwave absorption properties.