It was found that the activation energy for diffusion decreased with increasing AgI concentration. At concentrations of between 12 and 40mol%AgI, it was essentially the same as that for conduction. At higher AgI concentrations, the activation energy for diffusion became larger than that for conduction. The samples could be divided into 2 groups with regard to conductivity (table 240). Those materials which contained between 12 and 40mol%AgI were normal ionic conductors. The samples which contained between 50 and 64mo1%AgI exhibited properties which were close to those of a superionic conductor in magnitude.

J.G.Vlasov, E.A.Bychkov, A.V.Legin, M.M.Daved: Elektrokhimiya, 1991, 27[11], 1432-9 (Soviet Electrochemistry, 1991, 27[11], 1266-73)

Table 240

Conductivity Parameters for AgI-PbS-As2S3 Glasses