NDLI: Concentration dependence of electric conductivity for fluorine-containing sodium borate glasses

Content Provider	Springer Nature Link
Author	Pronkin, A. A. Naraev, V. N. Murin, I. V. Sokolov, I. A.
Copyright Year	2000
Abstract	The influence of sodium fluoride additives on the physicochemical properties of glasses in the Na2O-B2O3 systems is investigated. The introduction of sodium fluoride into the Na2O · 2B2O3 and Na2O · 3B2O3 glasses leads to an increase in the electric conductivity. The temperature-concentration dependence of the electric conductivity has been investigated. It is shown that, in glasses of the NaF-Na2O · 2B2O3 system, an increase in the volume concentration of sodium ions from 2.4 × 10−2 to ∼3 × 10−2 mol/cm3 is accompanied by an insignificant decrease in the activation energy Eσ from 1.44 to 1.38 eV and a sharp (by a factor of ∼30) increase in the electric conductivity. In glasses of the NaF-Na2O · 3B2O3 system, an increase in the concentration of sodium ions from 1.8 × 10−2 to ∼2.3 × 10−2 mol/cm3 brings about an increase in the electric conductivity by a factor of approximately 100 and an increase in Eσ from 1.6 to 1.83 eV. A further increase in the concentration of sodium ions (up to 2.5 × 10−2 mol/cm3) virtually does not affect the electric conductivity and Eσ. At the same concentration of sodium ions (∼2.46 × 10−2 mol/cm3) in the 9.8NaF · 90.2[Na2O · 2B2O3] and 57.1NaF · 42.9[Na2O · 3B2O3] glasses, the electric conductivity and the activation energy are considerably higher in the glass with a larger fluorine content. The regularities revealed are interpreted in the framework of the microinhomogeneous glass structure.
Starting Page	268
Ending Page	273
Page Count	6
File Format	PDF
ISSN	10876596
Journal	Glass Physics and Chemistry
Volume Number	26
Issue Number	3
e-ISSN	1608313X
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2000-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ceramics, Glass, Composites, Natural Methods Characterization and Evaluation of Materials Materials Science Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Condensed Matter Physics

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