Abstract
The temperature–concentration dependences of the electrical conductivity and the activation energy for electrical conduction of glasses in the Na2O–B2O3 and Na2O–2PbO · B2O3 systems are studied. The investigation into the nature of the electrical conduction in these glasses reveals that the contribution from the electronic component (10–3%) of the conductivity is within the sensitivity of the Liang–Wagner technique. A considerable alkali conductivity is observed upon introduction of more than ∼12 mol % Na2O. The true transport number of sodium η Na is as large as unity at [Na2O] ≅ 15 mol %. It is shown that the observed temperature–concentration dependences of the electrical and transport properties are governed by the ratio between the concentrations of polar and nonpolar structural–chemical units of the Na+[BO4/2]–, Na+[O–BO2/2] ⇒ Na+[O–BO2/2], Pb2+ 1/2[BO4/2]–, Pb2+ 1/2[O–BO2/2], and [BO3/2] types.
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Sokolov, I.A., Murin, I.V., Mel'nikova, N.A. et al. Electrical Properties and the Structure of Glasses in the xNa2O–(1 – x)2PbO · B2O3 System. Glass Physics and Chemistry 28, 239–245 (2002). https://doi.org/10.1023/A:1019914329375
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DOI: https://doi.org/10.1023/A:1019914329375