Estimation of ionic drift velocity on some fast Ag+ ion conducting systems

A novel experimental technique for approximate estimation of drift velocity (v(d)) of mobile Ag+ ions in some superionic systems is reported. Wagner's de polarisation method, widely used to determine the ionic transference number (t(ion)), was employed as a tool in these measurements. As v(d) is directly proportional to ionic mobility (mu) at a tired applied de field, thus, the thermally activated processes involved in the temperature dependence of v(d) and mu should exhibit identical behaviour. Energy (E-d) values computed from log v(d) - 1/T plots in the present study are in reasonably good agreement with energy (E-m) values obtained earlier from log mu-1/T plots. (C) 1998 Elsevier Science S.A. All rights reserved.