The 110mAg tracer diffusion coefficient in ternary (CdSe)x(AgI)0.5-x/2(As2Se3)0.5-x/2 glasses decreased by two orders of magnitude upon increasing x from 5.8 x 10−9cm2/s (x = 0) to 5.1 x 10−11cm2/s (x = 0.2) at room temperature. Simultaneously, the diffusion activation energy increased from 0.31 to 0.47eV. These changes were similar to the conductivity variations and indicated that semiconducting CdSe additives were reducing the Ag+ ion transport. A detailed analysis of the Haven ratio HR(x) also suggested that the CdSe-rich glasses (x = 0.1–0.2) were mixed conductors at high temperatures. The HR(x) composition dependence showed a well-known trend for mixed cation oxide and chalcogenide glasses; the HR(x) increased with x. The last phenomenon was consistent with the proposed non-random mixing of silver and cadmium species within the preferential conduction pathways but implied immobilisation of some neighbouring Ag+ cations by a Cd2+ ion.

110mAg Tracer Diffusion Studies of CdSe–AgI–As2Se3 Glasses. I.Alekseev, M.Kassem, D.Le Coq, M.Bokova, M.Fourmentin, E.Bychkov: Solid State Ionics, 2010, 181[33-34], 1467-72