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DC and AC Conductivity Studies in Silver FICGlasses

E.Ramesh Kumar, K.Rajanikumari, B.Appa Rao, G.Bhikshamaiah

Fast ion conducting (FIC) glasses of composition 66%AgI-[MAg2O-F{(F1)B2O3-(F2)TeO2}] were prepared by melt quenching technique. Here M/F ratio was varied from 0.0 to 2.0 in steps of 0.25 for fixed values of F1& F2. The prepared samples were characterized by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) experiments to understand their structure. Electrical studies of the prepared glasses were carried to evaluate DC and AC conductivity, activation energy and break down strength of them. The DC Conductivity was increased from 10-5 to 10-2 Scm-1 at room temperature. The activation energy (Edc) was decreased from 0.44 to 0.20eV. The breakdown strength varied from 2.9 to 1.7kV/cm as Ag2O concentration increased gradually. These results confirm that the addition of Ag2O has significantly enhanced the electrical conductivity of prepared silver borate glasses. The prepared fast ion conducting glasses can be effectively used as electrolytes in solid state batteries.