Electrical transport studies on CdI2 doped silver oxysalt system

A new glass system xCdI2-(100-x)[2Ag2O-(0.7V2O5-0.3B2O3)], x = 5-20, was prepared by melt quenching. The electrical conductivity of the samples was determined at different temperatures and frequencies. The transport number of the Ag+ determined by the emf method was 0.98. The frequency dependence of electrical conductivity was analysed by Jonscher's power law. Data were analysed in terms of permittivity and modulus formalisms. The modulus spectra of the system suggest a distribution of the relaxation time, which was found to be temperature independent. The cooperative motion due to strong coupling between the mobile Ag+ ions is assumed to give rise to the non-Debye type of relaxation. The behaviour of ac conductivity and relaxation phenomenon can be explained by the diffusion controlled relaxation model proposed by Elliott. 15 refs.