Abstract
Glasses of the 6Na2O–(24–х)B2O3–70SiO2–хFe2O3 system with x ranging from 2 to 10 mol % are studied by dilatometry and X-ray powder diffractometry. The density of the glass is measured and the molar volume is calculated. The heat treatment of the glass is carried out at 550 and 700°C for 96 and 2 h, respectively. Magnetite is formed in the heat-treated glasses and its content increases with the growth of the Fe2O3 concentration. In the glasses containing from 4 to 8 mol. % of Fe2O3, cristobalite is formed after treatment at 700°C for 2 h. An increase in the density and the glass transition temperature and a decrease in the molar volume is observed with the growth of the iron oxide content.
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References
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Original Russian Text © M.Yu. Konon, S.V. Stolyar, I.N. Anfimova, I.G. Polyakova, L.F. Dikaya, 2018, published in Fizika i Khimiya Stekla.
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Konon, M.Y., Stolyar, S.V., Anfimova, I.N. et al. Physicochemical Properties of Glasses of the Na2O–B2O3–SiO2–Fe2O3 System in the 6Na2O/70SiO2 Section. Glass Phys Chem 44, 495–497 (2018). https://doi.org/10.1134/S1087659618050097
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DOI: https://doi.org/10.1134/S1087659618050097