Glass formation and electrical conductivity of glasses in the Na2Se-P2Se5 system in a wide temperature range

The glass formation region in the Na 2 Se-P 2 Se 5 system and the temperature-concentration dependences of the electrical conductivity of glasses have been investigated over a wide range of temperatures. The densities and glass transition temperatures T g of glasses have been determined. A compariso...

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Bibliographic Details
Published in:Glass physics and chemistry 2010-02, Vol.36 (1), p.21-26
Main Authors: Sokolov, I. A., Murin, I. V., Startsev, Yu. K., Zubkova, M. Yu, Pronkin, A. A.
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
Physical Chemistry
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Summary:The glass formation region in the Na 2 Se-P 2 Se 5 system and the temperature-concentration dependences of the electrical conductivity of glasses have been investigated over a wide range of temperatures. The densities and glass transition temperatures T g of glasses have been determined. A comparison of the electrical conductivity of glasses in the Na 2 Se-P 2 Se 5 and Na 2 O-P 2 O 5 systems has demonstrated that the conductivity of selenium-containing glasses (at 25°C) is approximately three orders of magnitude higher than the electrical conductivity of oxide glasses. The assumption has been made that an increase in the electrical conductivity of glasses with selenium is caused by the increase in the degree of dissociation of Na + [Se − PSe 3/2 ] polar structural chemical units and the higher mobility of sodium ions in the oxygen-free matrix.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659610010049