Phase separation in the glasses of the (8–x)Na2O · xFe2O3 · 22B2O3 · 70SiO2 system
- Authors: Konon M.Y.1, Stolyar S.V.1, Polyakova I.G.1, Drozdova I.A.1, Kurilenko L.N.1
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Affiliations:
- Grebenshchikov Institute of Silicate Chemistry
- Issue: Vol 42, No 6 (2016)
- Pages: 631-634
- Section: Short Communication
- URL: https://journals.rcsi.science/1087-6596/article/view/215828
- DOI: https://doi.org/10.1134/S1087659616060109
- ID: 215828
Cite item
Abstract
Glasses with the (8–x)Na2O · xFe2O3 ∙ 22B2O3 ∙ 70SiO2 compositions, where the Fe2O3 content varies from 2 to 6 mol %, which were heat-treated at the temperatures of 550 and 700°С for 144 and 2 h, respectively, have been studied by dilatometry, electron microscopy, and X-ray powder diffractometry. It has been shown that, with an increase in the total concentration of Fe2O3 in the glass, there is a trend to the transition from an interconnected to a droplet-matrix phase-separated structure. The crystal line phases of Fe3O4, FeSiO3, and β-Fe2O3 are formed depending on composition, while the latter is observed only in the glass with the equivalent contents of Na2O and Fe2O3. There is a minimum on the glass transition temperature dependence of the composition at equimolar (4 mol %) contents of Na2O and Fe2O3.
About the authors
M. Yu. Konon
Grebenshchikov Institute of Silicate Chemistry
Author for correspondence.
Email: marina-konon@mail.ru
Russian Federation, St. Petersburg, 199034
S. V. Stolyar
Grebenshchikov Institute of Silicate Chemistry
Email: marina-konon@mail.ru
Russian Federation, St. Petersburg, 199034
I. G. Polyakova
Grebenshchikov Institute of Silicate Chemistry
Email: marina-konon@mail.ru
Russian Federation, St. Petersburg, 199034
I. A. Drozdova
Grebenshchikov Institute of Silicate Chemistry
Email: marina-konon@mail.ru
Russian Federation, St. Petersburg, 199034
L. N. Kurilenko
Grebenshchikov Institute of Silicate Chemistry
Email: marina-konon@mail.ru
Russian Federation, St. Petersburg, 199034