Mixed glass former effect in AgI-Ag<inf>2</inf>O-V<inf>2</inf>O<inf>5</inf>-P<inf>2</inf>O<inf>5 </inf> quaternary amorphous solid electrolytes

In the process of investigating electrical conduction in ternary and quaternary amorphous solid electrolytes, interesting results have been obtained in the AgI-Ag2O-V2O5-P2O5 quaternary system. The present investigation reports the mixed glass former effect on the ionic and electronic conductivities and glass transition temperatures of the electrolyte compositions mol% 66.67 AgI-22.22Ag2O-11.11((1-x)V2O5-xP 2O5). A double maxima was observed in the ionic conductivity at x = 0.2 and 0.7 where the electronic conductivity assumes minimum values. The glass transition temperature was observed to increase with x in analogy with amorphous semiconducting (1-x)V2O5-xP2O5- oxides. These results are discussed on the basis of the entropy of mixing two glass formers and the possible structural changes that might occur in the quaternary amorphous network due to the presence of a second glass former. The observed properties are compared to the ternary amorphous systems AgI-Ag2O-V2O5 and AgI-Ag2O-P2O5 emphasising the mixed glass former effect in light of their covalency and field strength. © 1990.