Samples of Ag-ion conducting glasses of the form, xAgI–(1-x)Ag2WO4 with x = 0.80 to 0.55, were prepared by using a rapid melt-quenching method. Their properties were investigated by means of X-ray, differential scanning calorimetry, impedance and Ag-109 nuclear magnetic resonance measurements. The glass transition temperatures ranged from 110 to 187C. The glasses exhibited ionic conductivities of 2.5 x 10−3S/cm at x = 0.55 and 2.3 x 10−1S/cm at x = 0.80. They varied exponentially with increasing AgI content. The Ag-109 nuclear magnetic resonance spectra supported the high mobility of Ag ions in the glasses. From these and other results, it was deduced that the W ions were octahedrally coordinated by O ions; as in crystalline Ag2WO4 and Ag26I18W4O16. This was quite different to the structure of AgI–Ag2MoO4 glasses.

Structure and Ionic Conductivity of Rapidly Quenched AgI–Ag2WO4 Superionic Conductor Glasses. M.Hosono, J.Kawamura, H.Itoigawa, N.Kuwata, T.Kamiyama, Y.Nakamura: Journal of Non-Crystalline Solids, 1999, 244[1], 81-8