Preparation of Composite Materials of Silicon Rubber Reinforced by (CrMnxNi1-xFeO4) for Microwave absorption at X-band

In this paper, samples of silicon rubber reinforced by Ferrite compounds (CrMnxNi1-xFeO4) where x = (0.1,0.3,0.7,0.9) and (2,3)g for the added ferrite were prepared. The properties of attenuation of microwave waves within the X-band (8-12 GHz) were studied using the Vector Network Analyzer (VNA). When reinforced by 2 g of Ferrite, The maximum value of the reflective loss factor (-26.5 dB) at (11.2 GHz). The mean value of the reflection coefficient was 0.1 for x = 0.3 at the frequency (11.16-11.23 GHz). The value of the reflective loss (-25.56dB) at the frequency (10.08GHz), and the reflection coefficient reached the lowest value (0) at the frequency (8.14, 11.98 GHz) for the ratio x = 0.1. The relative permeability and relative Permittivity were also studied, where it was greater than one at most frequencies. The highest relative permeability value was 7.8 at (8.14GHz) for X = 0.1 at the addition of 3g of Ferrite. The greatest value of relative permeability reached 9.13 at (8.34GHz) for X=0.1 at addition of 2g of Ferrite.