Electrodynamic Properties of (BeO + TiO2)-Ceramics in the Centimeter Wavelength Range

Abstract

Electrodynamic properties of composite (BeO + TiO₂)-ceramics in the frequency range 8 – 12 GHz are studied. An increase in ceramic sintering temperature from 1823 to 1933 K after introducing TiO₂ micro- and nanopowders into BeO mixtures makes it possible to influence the efficiency of (BeO + TiO₂)-ceramics as an absorbing component of microwave radiation by increasing the modulus of imaginary and real parts of the dielectric constant. Additional reduction annealing in a hydrogen atmosphere at 1073 K further changes the ceramic electrical conductivity and enhances the effect of its ability to absorb UHF-radiation.