Abstract
Glass electrodes are fabricated from the title glasses, and the emf–pH curves are measured at room temperature. The structural role played by the glass components is elucidated from an analysis of the curves. The TiO2, ZrO2, Nb2O5, and Ta2O5 oxides are network-formers, and their effect on the electrode properties of glasses upon simultaneous introduction is summarized within the limits of the studied compositions, whereas the total acidity of the glass increases. The oxides of modifiers La, Ba, Sr, and Ca neutralize the acidic groups of the network-former (supposedly [ZrO6/2]2–). The tendency to neutralization decreases in the above order. The ionic electrode selectivity of glasses with an increased content of ZrO2, which contain Nb2O5 and Ta2O5, is expressed by the series H+ ≫ Na+ > Li+ > K+.
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Belyustin, A.A., Ivanovskaya, I.S., Livshits, V.Y. et al. Investigation of the Electrode Properties of Glasses as a Method for Elucidating the Structural Role of Their Components: The 25Na2O–15TiO2–6ZrO2–4RxOy–50SiO2 System (R = Ca, Ba, Sr, La, Nb, and Ta). Glass Physics and Chemistry 28, 96–102 (2002). https://doi.org/10.1023/A:1015329614779
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DOI: https://doi.org/10.1023/A:1015329614779