The transport properties of polycrystalline and vitreous electrolytes, with glass-former to glass-modifier ratios of between 0.33 and 1, were determined (table 227). It was found that the composition with a former/modifier ratio of unity exhibited 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 227

Room Temperature Ionic Conductivity and Activation Energy

for Conduction in AgI-Ag2O-As2O3 Electrolytes