DC Conductivity of Copper-Bismuth Glasses doped with TiO2 and ZnO

Abstract

The dc electrical conductivity of glasses with composition 40CuO-40Bi₂O₃-20TiO₂ and 40CuO-40Bi₂O₃-20ZnO prepared by rapid quenching method has been investigated over the temperature range 300 – 600 K. The glassy phase is confirmed from X-ray diffraction (XRD) pattern which shows a broad hump around 2θ = 30^o. The dc conductivity of ZnO doped glass at all the temperatures is higher than that of the corresponding composition doped with TiO₂ but the general trend of the increase or decrease of conductivity and activation energy are similar in both the glasses. Holstein’s relation suggests that hopping conduction is in non-adiabatic region for both the glasses.