Abstract
A quaternary super-ionic glass system xAgI: (95-x) [Ag2O:2V2O5]: 5TeO2, where 40 ≤ x ≤ 65 in steps of 5, has been pre- pared by melt quenching technique. The prepared glass samples are characterized by X-ray, FTIR and DSC studies. As revealed by the FTIR spectra, the oxyanion network is not affected by the addition of AgI. The frequency dependence of the electrical conductivity for various glass compositions at different temperatures has been analyzed in terms of Jon- scher’s universal power law. The measurements reveal that the conductivity increases from σ = 7.62 × 10–7 S/cm to 1.15 × 10–4 S/cm with increasing AgI content. The temperature dependent conductivity obeys the Arrhenius relationship. The impedance and modulus studies indicate the non-debye type of the frequency dispersion for all the glass samples.
Highlights
AgI and Ag oxysalt based ion conducting materials attracted much attention from last many years, because of their high ionic conductivity at room temperature [1,2,3,4]
The prepared glass samples are characterized by X-ray, Fourier Transform Infrared (FTIR) and Differential Scanning Calorimeter (DSC) studies
From the IR spectra we have concluded that the network structure of prepared glass samples is formed of vanadate and tellurite oxides and it remains unaltered with AgI concentration
Summary
AgI and Ag oxysalt based ion conducting materials attracted much attention from last many years, because of their high ionic conductivity at room temperature [1,2,3,4]. The glasses formed by AgI and Ag oxysalt complexes are constituted by randomly oriented micro domains made by arrays of tetrahedral oxysalt complexes [5]. These complexes are linked together and are surrounded by nonmobile Ag+ ions which coordinate iodide polyhedra containing mobile Ag+ ions. It is found that the ionic conductivity increases with the AgI content in the glass composition. The objective of present work is to investigate the influence of AgI salt content on conduction mechanism and ionic relaxation behavior in Ag2O-V2O5 -TeO2 glass system in framework of the modulus formalism i.e., the conductivity relaxation mechanism. In order to view this effect, we have prepared xAgI - (95-x)[Ag2O:2V2O5] 5TeO2 glass system, where 40 ≤ x≤ 65 in steps of 5 in the present paper
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