Electrical Conductivity of Glass
of the 8Na₂O(22 x)B₂O₃70SiO₂xFe₂O₃ System

M. Yu. Konon and S. V. Stolyar

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Makarova 2, St. Petersburg, 199034 Russia

e-mail: marina-konon@mail.ru

Received January 26, 2015

Abstract—The electrical properties of glasses of the 8Na₂O–(22 – x)B₂O₃–70SiO₂–xFe₂O₃ system, where x
varies from 0.3 to 10 mol %, were studied. The glasses were heat treated at temperatures of 550 and 700C for
144 and 2 h, respectively. When comparing the results of the measurements of the electrical resistance and the
calculated values of activation energy of electrical conductivity of the iron-containing glasses and iron-free
glass of the 8Na₂O · 22B₂O₃ · 70SiO₂ composition, it was concluded that the ionic conductivity is observed in
the studied Fe₂O₃-containing glasses. An increase in conductivity with increasing content of Fe₂O₃ was
observed for glasses that was heat treated at 700C for 2 h.

Keywords: Na₂O–B₂O₃–SiO₂–Fe₂O₃ system, phase-separated glass, electrical conductivity, magnetite

DOI: 10.1134/S1087659615060073

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