Abstract
Rugby-shaped CoFe2O4/graphene composites were synthesized using a vapor diffusion method in combination with calcination. The morphologies and structures of the products were characterized by field emission scanning electron microscopy, X-ray diffractometer, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The magnetic and electromagnetic parameters were measured using a vibrating sample magnetometer and a vector network analyzer, respectively. Results show that rugby-shaped CoFe2O4 particles are distributed on graphene sheets. A minimum reflection loss (RL) of −39.0dB is observed at 10.9GHz for the sample with a thickness of 2.0mm, and the effective absorption frequency (RL<−10dB) ranges from 9.6 to 14.3GHz, indicating the excellent microwave absorption performance of the products. The absorbing performance of the CoFe2O4 rugbies/graphene composites is better than that of the CoFe2O4 nanoparticles/graphene composites.
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