A Study on the Nature of Current Carriers
in the Na₂OP₂O₅ Glasses

V. N. Naraev and A. A. Pronkin

St. Petersburg State Technological Institute (Technical University), Moskovskii pr. 26, St. Petersburg, 198013 Russia

Abstract—The temperature–concentration dependences of the electric conductivity for glasses in the
xNa₂O(100 – x)P₂O₅ system (x = 30–55 mol %) are investigated. The contribution of sodium cations to the
electricity transport is determined. It is revealed how impurity structurally bound water affects the electric con-
ductivity. The method based on the use of stable isotopes is advanced for studying the migration of ions formed
upon dissociation of structurally bound water. The electricity transport in the Na₂O–P₂O₅ glasses is provided
by the migration processes of sodium cations Na⁺ and protons H⁺ that are formed upon the dissociation of struc-
turally bound water.

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