Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1134/S0020168522060024

Ключевые слова: δ-phase of bismuth silicate, metastable equilibrium, metastable melt solidification, heat treatment of a melt

Аннотация: We have studied the effect of isothermal holding of a melt containing 78 mol % Bi2O3 and 22 mol % SiO2 and various melt cooling schedules on the morphology, microstructure, and phase composition of crystals of a metastable solid solution based on the high-temperature δ-polymorph of Bi2O3 (δ*-phase). The results demonstrate that high-temperature holding is favorable for melt supercooling and crystallization of the δ*-phase in a wide range of cooling rates. We have investigated peritectoid decomposition of the δ*-phase at subsolidus temperatures. Its products are a silicon dioxide-deficient δ4-phase and crystalline polymorphs of metastable SiO2.

Журнал: Inorganic Materials

Выпуск журнала: Т.58, №6

Номера страниц: 604-611

ISSN журнала: 00201685

Место издания: Москва

Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)

• Bermeshev T.V. (Siberian Federal University)
• Zhereb V.P. (Siberian Federal University)
• Bundin M.P. (Siberian Federal University)
• Yasinsky A.S. (IME, Institute for Process Metallurgy and Metal Recycling, RWTH Aachen University)
• Yushkova O.V. (Siberian Federal University)
• Voroshilov D.S. (Siberian Federal University)
• Samoilo A.S. (Siberian Federal University)
• Mazurova E.V. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
• Zaloga A.N. (Siberian Federal University)
• Yakivyuk O.V. (Siberian Federal University)
• Bespalov V.M. (Siberian Federal University)

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