Transport studies on a new fast silver ion conducting system: 0.7[0.75AgI:0.25AgCl]:0.3[yAg(2)O:(1-y)B2O3]

A silver borate system with the composition 0.7[0.75AgI:0.25AgCl]:0.3[yAg(2)O(3):(1 - y)B2O3] has been prepared in which the host salt used is a ''quenched [0.75AgI:0.25AgCl] mixed system'' instead of the commonly used host AgI. Three sample preparation procedures were adopted: (a) molten sample at similar to 650 degrees C dropped into neutral liquid bath at similar to 10 degrees C; (b) molten sample in silica ampule at similar to 650 degrees C left in air to cool by itself; (c) molten sample left in furnace and allowed to come to room temperature in similar to 24 h. The highest room temperature conductivity sigma similar or equal to 2.23 x 10(-2) S cm(-1) was obtained for the sample composition: 0.7[0.75AgI:0.25AgCl]:0.3[0.833Ag(2)O:0.167B(2)O(3)] prepared by procedure ''a'' and referred to as an ''optimal composition''. The DTA, XRD (including linewidth measurement for determining Scherrer length/crystallite size), temperature dependence of sigma (by Impedence Spectroscopy), mobility mu (by Transient Ionic Current technique), and number of charge carriers n are also reported. Solid state batteries with the cell configuration: Ag/0.7[0.75AgI:0.25AgCl]:0.3[0.833Ag(2)O:0.167B(2)O(3)]/ (C + I-2) were fabricated and the discharge characteristics were studied.