Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1007/s11172-021-3240-1
Ключевые слова: bismuth silicate, glass transition, macroscopic phase separation in the melt, melt crystallization, melt heat treatment, metastable phase
Аннотация: The effect of heat treatment conditions (temperature and time of isothermal holding, temperature of the start of cooling and cooling conditions) of a melt containing 50 mol.% Bi2O3 and 50 mol.% SiO2 on the phase composition and macro- and microstructure of solidification products was studied. The temperatures and ranges of macroscoПоказать полностьюpic phase separation of the melt were determined. Using physicochemical methods (powder X-ray diffraction, optical and scanning electron microscopy, and atomic absorption analysis), it was established that depending on the melt cooling conditions, solidification gives crystals of metastable bismuth silicate Bi2SiO5, or a mixture of crystalline phases and glass, or glass. The crucial influence of the holding temperature and time and the melt cooling rate on the crystallization of metastable Bi2SiO5 and formation of crystals of stable phases was demonstrated. © 2021, Springer Science+Business Media LLC.
Журнал: Russian Chemical Bulletin
Выпуск журнала: Vol. 70, Is. 8
Номера страниц: 1462-1470
ISSN журнала: 10665285
Издатель: Springer