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)

• Published in: Glass physics and chemistry Vol. 28; no. 2; pp. 96 - 102
• Main Authors: BELYUSTIN, A. A, IVANOVSKAYA, I. S, LIVSHITS, V. Ya, POLUNINA, E. M
• Format: Journal Article
• Language: English; Russian
• Published: Moscow Kluwer/Plenum 01.03.2002; New York, NY Nauka/Interperiodica; Springer Nature B.V
• Subjects: Electrodes
• ISSN: 1087-6596; 1608-313X
• DOI: 10.1023/A:1015329614779

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 TiO^sub 2^, ZrO^sub 2^, Nb^sub 2^O^sub 5^, and Ta^sub 2^O^sub 5^ 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 [ZrO^sub 6/2^]^sup 2-^). The tendency to neutralization decreases in the above order. The ionic electrode selectivity of glasses with an increased content of ZrO^sub 2^, which contain Nb^sub 2^O^sub 5^ and Ta^sub 2^O^sub 5^, is expressed by the series H^sup +^ Na^sup +^ > Li^sup +^ > K^sup +^.[PUBLICATION ABSTRACT]