Studies on dielectric dispersion, relaxation kinetics and a.c. conductivity of Na2OCuOSiO2 glasses mixed with Bi2O3-Influence of redox behavior of copper ions
Na2OCuOSiO2 glasses mixed with different concentrations Bi2O3 were synthesized. Various dielectric parameters were measured in broad frequency and temperature regions. The dielectric loss, electric moduli exhibited relaxation effects. σac is decreased by 3 orders of magnitude with increase of Bi2O3 from 4 to 20 mol%. Results indicated increase of insulating character of the glass with Bi2O3 content.