A Quaternary glassseries with composition xLi₂O•20PbO•(25-x)Bi₂O₃•55B₂O₃ (where 0 ≤ x ≤ 25 mol%) was synthesized using the conventional melt-quenching technique. X-ray diffraction (XRD) analysis revealed a broad hump, confirming the amorphous nature of all the glass samples. The electrical properties of the synthesized glass series was systematically investigated over a frequency range of 10⁻¹ Hz to 10⁶ Hz and at temperatures between 473 K to 573 K. Parameters such as direct current (DC) conductivity, crossover frequency, and the frequency exponent (s) were determined by fitting experimental data to the Almond–West power law. The AC conduction behavior was found to align with the correlated barrier hopping (CBH) model. Notably, an increase in lithium oxide content significantly enhanced the mobility of charge carriers, resulting in a marked increase in AC conductivity. The estimated activation energy based on conductivity (1.214–0.873 eV), electric modulus (1.253–0.81 eV), and impedance (1.247–0.87 eV) analyses are in good agreement. These findings suggest that lithium-modified lead-bismuth borate glasses hold considerable potential for applications that demand high ionic conductivity.

Borate Glass, XRD, DC Conductivity, AC Conductivity