Abstract
We report the results of ion-exchange experiments conducted on 17 commercial soda–lime–silicate (SLS) float glass and 8 experimental SLS glass compositions. A significant variation in the depth of K + penetration with relatively small changes in composition was observed. The data were fit to a multiple regression model in which the major oxides are the independent variables and depth of K + is the dependent variable. The model indicates that increased depth of exchange (increased interdiffusion coefficient) correlates predominantly with increased K 2O and/or Na 2O content of the glass, with a decreased total alkaline earth content and with the ratio of CaO/MgO.
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