Crystallization of Sodium Borosilicate Glass with the Addition of Cr2O3

Glass composition of 6Na 2 O 22B 2 O 3 ·70SiO 2 ·2Cr 2 O 3 is studied by scanning electron microscopy, X‑ray powder diffractometry (XRPD), and differential thermal analysis, depending on the duration of heat treatment at a temperature of 550°C. It is established that during heat treatment for 24–96...

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Bibliographic Details
Published in:Glass physics and chemistry 2023-04, Vol.49 (2), p.199-202
Main Authors: Konon, M. Yu, Polyakova, I. G., Saratovskii, A. S., Danilovich, D. P., Anfimova, I. N.
Format: Article
Language:English
Subjects:
Borosilicate glass
Brief Message
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium oxides
Composites
Cristobalite
Crystallization
Differential thermal analysis
Glass
Glass transition temperature
Heat treatment
Materials Science
Natural Materials
Phase separation
Physical Chemistry
Silicon dioxide
Viscosity
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Description
Summary:Glass composition of 6Na 2 O 22B 2 O 3 ·70SiO 2 ·2Cr 2 O 3 is studied by scanning electron microscopy, X‑ray powder diffractometry (XRPD), and differential thermal analysis, depending on the duration of heat treatment at a temperature of 550°C. It is established that during heat treatment for 24–96 h, a phase separation structure with interpenetrating phases is formed in the studied glass, and a crystalline phase of eskolaite—Cr 2 O 3 is also formed. With the maximum heat treatment duration of 96 h, cristobalite is formed in the bulk of the glass, which is accompanied by a decrease in the glass transition temperature of the low-viscosity phase. In this case, the intensity of eskolaite peaks decreases. Cr 2 O 3 and SiO 2 crystallize apparently due to the substance of the low-viscosity phase.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659622601083