Abstract
A theoretical analysis was made of the possible use of solid electrolytes with oxygen-ion conductivity for investigation of the relative basicity of silicate melts, and the optimum design of the electrochemical cell was chosen. Glasses in the SiO2-Na2O system were synthesized, and ceramic sensory membranes based on the cubic solid solution (ZrO2)0.92(Y2O3)0.08 were prepared. An electrochemical cell based on ZrO2 and HfO2 and intended for investigation of glass-forming melts with the use of a platinum electrode and a reference electrode with oxygen-ion conductivity was designed and fabricated. The concentration dependence of the electromotive force of the electrochemical cells was examined for melts in the SiO2-Na2O system containing alkali oxide in different concentrations. A mathematical treatment of the obtained dependence of the electromotive force on the Na2O concentration in this system was performed. The results obtained were used to calculate the relative oxygen ion activities and the corresponding pO values for alkali silicate melts under investigation.
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