Abstract
Temperature dependent dc polarization/self-depolarization studies, on a Ag+ ion conducting system : a quenched [0.75AgI:0.25AgCl] mixed-system/solid-solution, are reported. This system has recently been investigated in the present laboratory as a new and better alternate material in place of conventional host salt AgI. Sample pellets of different thicknesses were sandwiched between graphite (blocking) electrodes rind polarized under a constant de potential (similar to 0.5 V) for different intervals of time. A potential gradient develops across the sample pellet due to accumulation/polarization of mobile Ag+ ions at one end. At the state of complete polarization, the potential measured instantly after the removal of the external de field has been referred to as peak potential V-p. V-p-values directly indicate the availability of number of mobile Ag+ ions in the system at a particular temperature. V-p-measurements have been carried out as a function of polarization time and temperature in both beta and alpha-like phases of the system. The study revealed that the material attains the state of complete polarization in time t > 5 min, irrespective of the sample thickness. It is also observed that log V-p versus 1/T variation, in both beta and alpha-like phases of the material, is almost analogous to log n versus 1/T variation, reported earlier for the present system. This, in turn, has reconfirmed one of our assertion made earlier in regards to superionic conduction of alpha-like phase of the material which is predominantly due to an abrupt increase in n in this phase.