Electrical and Ionic Conduction Phenomena of Tl₂O₃ Mixed Multi-Component Li₂O–PbO–B₂O₃–SiO₂–Bi₂O₃–V₂O₅ Glass System

The synthesis of lithium lead borosilicate bismuth vanadate glasses with varying Tl₂O₃ concentrations (between 0 to 5.0 mol %) was achieved through the implementation of the melt quenching technique. A comprehensive analysis has been conducted to examine the electrical and dielectric properties over a broad spectrum of frequencies (10²–10⁶ Hz) and temperatures (303–573 K). According to the findings of conductivity studies, mixed conduction (both electronic and ionic) occurs in the produced glasses. As the concentration of Tl₂O₃ increases in the base glass, the dielectric properties, including dielectric loss, dielectric constant, and ac conduction, exhibit a decreasing trend. An increasing number of V⁵⁺ ions has been identified as being involved in the formation of networks near crystal structures of VO₅. The quantitative study of ac conductivity and dielectric property data revealed that increasing the concentration of Tl₂O₃ in the glass network increases the insulating character of the glass. In the glass structure, the migration of thallium ions to tetrahedral coordination from octahedral coordination occurs, accompanied by a de-clustering effect of these ions.