Electrical and Dielectric Properties of Agi-Ag2O-Bi2O3-B2O3 Ionic Glassy System

Abstract

The effect of composition in the ionic glassy system AgI-Ag2O3- Bi2O3-B2O3 on the electrical properties was investigated. The glasses have been prepared by melt quenching technique. The synthesized materials with up to 40 mol% AgI were formed in amorphous form. Above this value, the materials were only partially amorphous and contained crystalline inclusions, which were identified as  AgI. The electrical conductivity (, dielectric constant (e') and dielectric loss ( '' ) studies of the samples have been carried out at different temperatures and frequencies. The conductivity of the glasses increased with the increase in the AgI content and attains a highest ionic conductivity value with a composition of (AgI)0.3(Ag2O)0.2(Bi2O3)0.25(B2O3)0.25. The electrical data are discussed on the basis of Ag+ diffusion in the glassy structure, which plays a significant role in both conduction and dielectric relaxation processes in the glass matrix. (30) . The high conductivity values of these oxide glasses are interesting to their use as potential solid electrolytes in all-solid power sources for electronic devices operating at room temperature. In view of these facts, an attempt is being made to prepare oxysalt system used as solid electrolyte system with low cost and appreciably high conductivity. The present study deals with the preparation, structural analysis and measurement of ac-conductivity of ionic silver oxysalt system Ag2O-Bi2O3-B2O3 with AgI dopant to have a better solid electrolyte system with low cost and appreciably high conductivity.