Samples of Ag+/Na+ ion-exchanged aluminosilicate glasses with uniform concentration profiles were prepared, and their electrical conductivities were investigated as functions of the ion-exchange ratio and the initial glass compositions. In the case of the ion-exchanged glasses, SiO2-x20Ag2O–(1-x)20Na2O–10mol%Al2O3, the conductivity and activation energy went through a minimum and a maximum, respectively, at the same ion-exchange ratio of x = 0.3, and the mixed mobile ion effect was observed. The fully ion-exchanged sample attained a conductivity of 3.5 x 10-5S/cm at 200C; which was 1.5 orders of magnitude higher than that of the initial glass. In the case of SiO2-x25Ag2O–25Al2O3–(1-x)25Na2O, the mixed mobile ion effect was also observed at x = 0.5. The maximum conductivity, of 2 x 10-4S/cm at 200C, was obtained in fully ion-exchanged glass samples.

Ionic Conduction and Dielectric Relaxation in Ag+/Na+ Ion-Exchanged Aluminosilicate Glasses - Mixed Mobile Ion Effect and KWW Relaxation. T.Yano, T.Nagano, J.Lee, S.Shibata, M.Yamane: Solid State Ionics, 2002, 150[3-4], 281-90