Complex impedance and admittance of a silver-conducting glass

Abstract

From the analysis of complex impedance and admittance data of (Agl)75(Ag4P2O7)25 glass, an Ag+-ion conductor, it was revealed that the sample can be approximated by a seriesRC 1 circuit at high temperature, with the capacitorC 1 arising from the charge-carrier depleted region near the anode which develops as conduction proceeds, and by a parallelRC 2 circuit at low temperature, with the capacitorC 2 arising from the saturated value for ionic polarization of, say, the silver-iodine pairs as well as from the relaxation effect of the Ag+ ions for conduction. TheC 1 andC 2 values were found to be almost temperature-independent at peak frequencies of the distorted semicircles in respective complex planes, with the ratioC 1/C 2 as large as 104.