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Field-assisted diffusion of potassium ions in sodium silicate glass
Authors:S. I. Sviridov  N. P. Eliseeva
Affiliation:(1) Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, St. Petersburg, 199155, Russia
Abstract:The kinetics of interaction between the 20Na2O · 80SiO2 glass and the potassium nitrate melt is investigated in the presence of a dc electric field and without it. The interdiffusion coefficients and effective electrical mobilities of potassium ions, as well as the parameters of the temperature dependence of the electrical mobility, are determined. It is established that the models describing the field-assisted diffusion processes in the framework of the Nernst-Einstein equation are not applicable to analyzing the interactions responsible for the considerable changes in the chemical composition of the diffusion zone.
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