AC CONDUCTIVITY STUDIES ON THE SILVER MOLYBDO-ARSENATE GLASSY SYSTEM

A new quaternary fast-ion conducting silver molybdo-arsenate [Agl-Ag2O -(MoO3 + As2O5)] (SMA) glassy system has been prepared using the melt- quenching technique for various dopant salt (Agl) concentrations by fi xing the formers (MoO3 + As2O5) composition and the modifier (Ag2O) to formers (M/F) ratio. The prepared compounds were characterized by X-r ay diffraction. The impedance measurements were made on different Agl compositions of the SMA glasses as a function of frequency (6.5 Hz-65 kHz) and temperature (303-343 K), using the Solatron frequency-respons e analyser(model 1250). The bulk conductivity and the appropriate phys ical model (equivalent circuit) of the SMA glass were obtained from th e impedance analysis. The a.c. conductivity was calculated for differe nt Agl compositions of SMA glasses at various temperatures and the obt ained a.c. conductivity results were analysed using Jonscher's Univers al Law. The conduction mechanism for the highest conducting SMA glassy compound has been explained using the diffusion path model.