Microwave Absorbing Features of Ce2(Co0.3Fe0.7)17/Ferrite Coating Material

Abstract

This paper attempts to combine Ce2(Co0.3Fe0.7)17 and Co2Z-type hexagonal ferrite (hereinafter referred to the ferrite) into a composite with excellent absorbing properties. Firstly, the permittivity and permeability spectra of Ce2(Co0.3Fe0.7)17/epoxy resin composite were investigated, so were those of the ferrite/epoxy resin composite. On this basis, the author prepared coaxial Ce2(Co0.3Fe0.7)17/ferrite/epoxy resin composite specimens at different volume ratios of the Ce2(Co0.3Fe0.7)17 particles and the ferrite particles, and also studied their permittivity and permeability spectra in the frequency range of 8~18 GHz. In this way, the optimal volume ratios of both types of particles were determined for the composite. Through the analysis, it is concluded that, based on the matrix of epoxy resin and polyamide, the singlelayer plate absorber specimens can control the reflection loss within -10dB across the frequency range 8~18GHz, when the thickness is 1.1 mm, the fraction volume of Ce2(Co0.3Fe0.7)17 is 25 % and the fraction volume of ferrite is 20 %.