▎ 摘　　要

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 NiasZno.2CeaosFeLs404/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 123 GHz and a broad peak with a bandwidth lower than 10 dB is at 10.7-152 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. (C) 2013 Elsevier BV. All rights reserved.