Microwave Electrodynamic Characteristics of Ceramic Materials

The results of experimental studies of the developed veneering ceramics with electrically conductive SiC admixtures of 10 and 20 wt. % are presented. The main electrodynamic characteristics of ceramics such as microwave permittivity, dielectric loss tangent, attenuation and reflection coefficients were measured by PNA N5227A Keysight Technologies vector network analyzer in the frequency range of 1-67 GHz. The instrument software automates measurements of complex permittivity and permeability of materials. The results can be presented in S-parameter format, ', ", tan, ' and ". The effective permittivity of the composite depends on the filling factor of the composite matrix with particles (the ratio of the total volume of particles to the entire volume of the medium). In the case of low concentrations of nanoparticles, the approach based on the Maxwell-Garnett effective medium theory provides fairly accurate results. The characteristics of the developed ceramics are shown, which allow its use in construction engineering and electronic devices in order to effectively shield harmful electromagnetic radiation. According to the classification, ceramics themselves can be attributed to radio-absorbing ceramics.