Percolation-like approach to resistivity behaviour of glassforming ionic melts

The Vogel–Fulcher equation (and percolation approach) predicts an infinite resistivity below the “ideal” glassification point T0 (correspondingly- percolation threshold). However, the ions still preserve a noticeable mobility within the real glasses even below T0. To model the finite resistivity in glass a resistance Rmax of a broken bond is introduced. The ratio of Rmax/Rmin in real glasses is about 1014 and 1/Rmax might be identified with a probability of tunnelling process. The comparison of calculations’ result (with Rmax/Rmin=107 or 109) with our data on CKN is encouraging.