Relaxation process in PbI2-Ag2O-V2O5-B2O3 system: Dielectric, AC conductivity and modulus studies

Silver ion conducting super-ionic glass system xPbI2-(100 − x) [Ag2O-2(V2O5-B2O3)], where, 5 ≤ x ≤ 25, were prepared via melt quenching route and -characterized by XRD and DSC. Their electrical properties were measured by impedance spectroscopy in the frequency range of 2 MHz to 20 Hz from 30 to 120 °C. The electrical relaxation mechanism has been studied using AC conductivity, dielectric modulus function and frequency dependent dielectric permittivity over a wide range of frequency and temperature. Two different scaling approaches for AC conductivity as well as dielectric permittivity spectra were used to understand the nature of relaxation processes.