The transport properties of polycrystalline and vitreous electrolytes, with glass-former to glass-modifier ratios of between 0.33 and 1, were determined (table 228). It was found that a former/modifier ratio of 0.5 gave the highest ionic conductivity. It was suggested that ionic clusters existed in the most highly conducting materials, and that high ionic conductivities could be obtained only for those compositions in which a particular combination of glass former and glass modifier created cluster-like structures with glass-forming oxide polyhedra.

P.S.S.Prasad, B.Rambabu: Journal of Materials Science Letters, 1990, 9[9], 1066-70

Table 228

Room Temperature Ionic Conductivity and Activation Energy

for Conduction in AgI-Ag2O-As2O5 Electrolytes