Comparison of microwave absorbing properties of chloroprene rubber composites containing carbon black and nickel/cobalt powder

Abstract

In this study, the influence of hybrid combination of fillers (carbon black in concentrations from 0 to 100 phr and conducting nickel (Ni) or cobalt particles in concentration 10 phr on the dielectric (dielectric permittivity and dielectric loss angle tangent)) and microwave (reflection coefficient, attenuation coefficient, and shielding effectiveness) properties of chloroprene rubber composites has been investigated in the wide frequency range (1–12 GHz). The results achieved showed that the hybrid combination of Ni powder and active furnace carbon black gives an opportunity of considerable increase in the dielectric permittivity and also a possibility for its adjustment varying carbon black content. The comparison in the behavior of prepared composites can be explained by the differences in some characteristics of two metals and influence of these differences on the real and imaginary parts of the complex dielectric permittivity and magnetic permeability.