An evaluation was made of Yates' phenomenological model for divalent metal ion conductivity during electric-field assisted ion exchange. The electrical conductivity of a soda-lime-silica glass was measured during the replacement of Na ions by Zr2+, Pb2+ or Sn2+ ions from a molten salt containing only 1 mobile ion, in a cylindrically symmetrical configuration. An anode was placed on the inside wall, and a cathode on the outside wall, of a closed glass tube. A constant electrical potential was applied between the anode and the cathode, and current measurements were made frequently. The results were found to be in good agreement with Yates' phenomenological model, and the discrepancies were attributed to bubbles which insulated the anode.

Field-Assisted Replacement of Na+ by K+, Pb2+, Zn2+ and Sn2+ in Soda-Lime-Silica Glass. M.H.Shaaban, A.A.Ahmed, A.R.Cooper: Physics and Chemistry of Glasses, 1999, 40[1], 34-9