X-band Region Characterization of Neoprene Rubber Reinforced Cd-Zn Ferrite Composite Material

Abstract

The compound was prepared from (ZnFe₂O₄) and (CdFe₂O₄) The process of mixing the ferrite   compounds was done according to the formula (Cd_xZn_1-xFe₂O₄), The resulted compound was (Cd₀.₇Zn_0.3 Fe₂O₄). The compounds (ZnFe₂O₄) and (CdFe₂O₄) were prepared by Co-Precipitation method because this method gives a good homogeneity to the powder particles. XRD and  FE-SEM were performed, the results showed that ferrites had a phase-shaped cube  and an increase in the concentration of cadmium in the (Cd_xZn_1-x Fe₂O₄) compound .This result showed an increase in the lattice constant, the rate of crystalline size and the distance between the crystalline surfaces, due to the fact that the ionic radius of the cadmium is greater than the ionic diameter of the zinc, which is (0.83 A°).The images of the electron microscope (FE-SEM) showed an increase in particle size with an increase of concentration of cadmium ferrite in relation to the compound (CdxZn_1-x Fe₂O₄),The components of the ferrite structures prepared by EDS technique were verified, where the ferrite compound (Cd₀.₇Zn₀.₃Fe₂O₄) mixed with the Neoprene (Chloroprene Rubber) (CR) according to weight ratio of (3,6 g) of ferrite, after the process of forming rubber paste. The VNA was investigated for (8-12 GHz). It was observed that the reflection coefficient was reduced by increasing the fraction of ferrite to (6g) and obtain highly absorbent materials .Where the material behavior varies according to the frequency, as well as the concentration ratio in the ferrite and the quantity of the ferrite with Chloroprene rubber (CR).The Permeability of (Cd₀.₇Zn₀.₃Fe₂O₄) was calculated as a function of frequency.The real part of the amplitude showed the amount of energy from the external electric field stored in the material.