Crystallization of Sodium Borosilicate Glass with the Addition of Cr2O3

M. Yu. Konon; Конон М. Ю.; I. G. Polyakova; Полякова И. Г.; A. S.  Saratovskii; Саратовский А. С.; D. P. Danilovich; Данилович Д. П.; I. N.  Anfimova; Анфимова И. Н.

doi:10.31857/S0132665122600881

Crystallization of Sodium Borosilicate Glass with the Addition of Cr2O3

Autores: Konon M.Y.¹, Polyakova I.G.¹, Saratovskii A.S.¹^,2, Danilovich D.P.², Anfimova I.N.¹
Afiliações:
1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
2. St. Petersburg State Technological Institute (Technical University)
Edição: Volume 49, Nº 2 (2023)
Páginas: 204-208
Seção: КРАТКОЕ СООБЩЕНИЕ
URL: https://journals.rcsi.science/0132-6651/article/view/139318
DOI: https://doi.org/10.31857/S0132665122600881
EDN: https://elibrary.ru/NWDSFG
ID: 139318

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Resumo

Glass composition of 6Na2O 22B2O3·70SiO2·2Cr2O3 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—Cr2O3 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. Cr2O3 and SiO2 crystallize apparently due to the substance of the low-viscosity phase.

Palavras-chave

Na2O–B2O3–SiO2–Cr2O3 system, phase-seaparated glasses, glass transition temperature, crystallization, cristobalite, eskolaite

Bibliografia

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