Characteristic features of ionic conduction in AgI-Ag2O-V2O5 glasses

The glass forming region for AgI, Ag2O and V2O5 ternary system was determin ed. On the basis of the glass forming region, the glass transition temperat ure, density, ionic conductivity and Raman scattering experiments were perf ormed for nAgI-3Ag(2)O-2V(2)O(5) (n = 0-10) glasses. The glass transition t emperature and the density varies linearly with AgI concentration. On the o ther hand, the activation energy for ionic conductivity and the electric mo dulus indicate different composition dependence at about 40 mol.% of AgI. I t is verified that the network structure is essentially the same below and above this composition by Raman scattering experiment. The formation of AgI partial structure in higher AgI-doped glasses and its relation to the clus ter model is discussed in terms of both the present experimental results an d previous diffraction experiments. (C) 1998 Elsevier Science B.V. All righ ts reserved.