The conductivity, and conductivity relaxation, of glasses in the ZrF4-BaF2-YF3-LiF system (10 to 60mol%LiF), were investigated at 10Hz to 2MHz and from 300K to just below the glass transition temperature. The conductivity exhibited a minimum, and the activation energy a maximum, at 20mol%LiF. This was attributed to a cross-over from F--dominated conductivity to Li--dominated conductivity at 20mol%LiF. The glass decoupling index also exhibited a minimum for 20mol%LiF, and was associated with the minimum in the conductivity. However, the conductivity relaxation parameter went through a minimum at 30mol%LiF.

Electrical Conductivity and Conductivity Relaxation in ZrF4-BaF2-YF3-LiF Glasses. M.Sural, A.Ghosh: Journal of Physics - Condensed Matter, 1998, 10[47], 10577-86