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Structure and electric properties of Na2SO4-NaPO3 glasses

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Abstract

The influence of the SO 2−4 ion on the temperature and concentration dependences of electric conductivity and the structure of sodium phosphate oxide glasses was studied. The increased electric conductivity of sulfate-phosphate glasses was explained by the formation of mixed sulfate-phosphate fragments with terminal SO 2−4 ions in the structure of glasses in the Na2SO4-NaPO3 system. The dissociation energies of the sodium sulfate fragments are lower than those of pure oxide sodium phosphate structural units. As a result, the number of dissociated sodium ions increases, the activation energy of electric conductivity falls, and the conductivity (at 25°C) increases approximately 270-fold relative to the conductivity of NaPO3. The arrangement of SO 2−4 ions in the structure was evaluated from the IR spectra of the glasses.

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Authors and Affiliations

  1. St. Petersburg State University, St. Petersburg, Russia

    I. A. Sokolov, I. V. Murin & V. E. Kriyt

  2. St. Petersburg State Technological Institute, St. Petersburg, Russia

    A. A. Pronkin

Authors
  1. I. A. Sokolov
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  2. I. V. Murin
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  3. V. E. Kriyt
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  4. A. A. Pronkin
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Correspondence to V. E. Kriyt.

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Original Russian Text © I.A. Sokolov, I.V. Murin, V.E. Kriyt, A.A. Pronkin, 2011, published in Elektrokhimiya, 2011, Vol. 47, No. 4, pp. 436–441.

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Sokolov, I.A., Murin, I.V., Kriyt, V.E. et al. Structure and electric properties of Na2SO4-NaPO3 glasses. Russ J Electrochem 47, 410–415 (2011). https://doi.org/10.1134/S1023193511040173

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