Investigation of the Structure and Magnetic and Microwave Absorption Properties of Nanocomposite PVA/Graphite/CoFe1.97Ce0.03O4

Abstract

Composites PVA/Graphite/CoFe1.97Ce0.03O4 and PVA/CoFe1.97Ce0.03O4 were synthesized and studied. The morphology and structure of the starting materials and composites were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDXS) and infrared spectroscopy (IR). The magnetic parameters were measured using a vibrating magnetometer. The absorptive capacity of the obtained materials was evaluated based on the results of measuring the transmission and reflection coefficients using a scalar network analyzer in the range of 8–12 GHz. The results show that the absorption characteristics of the PVA/Graphite/CoFe1.97Ce0.03O4 composite are significantly higher than those of the PVA/CoFe1.97Ce0.03O4 composites. Effective absorption is observed for the PVA/Graphite/CoFe1.97Ce0.03O4 composite in the frequency range of 8–12 GHz and corresponds to −25.08 dB mm−1, which indicates excellent absorption characteristics of electromagnetic radiation in this frequency range.