Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1134/s2075113323020089
Ключевые слова: CASTing, stable phase, bismuth germinate, melt crystallization, heat treatment of the melt
Аннотация: The conditions for the preparation of a compound with an eulithine crystal structure (ECS) during the crystallization of a stoichiometric melt in the Bi2O3–GeO2 system by casting have been investigated. The initial components (Bi2O3 and GeO2) were placed in a platinum crucible and heated to a temperature in zone C at a rate of ~20°Показать полностьюC/min, with holding under isothermal conditions for 1 h. Then, the melt was poured from the crucible onto a heated platinum plate. The macrostructure of the surface of the crystallized samples was observed using a Stemi 2000 stereoscope (Carl Zeiss), and the microstructure was observed using a Carl Zeiss Axio Observer A1m optical microscope on microsections. X-ray phase analysis (XRD) of the powder was performed on a Shimadzu XRD 6000 diffractometer (CuKα radiation). Atomic absorption spectrometry was carried out on a SOLAAR M device. For the first time, the possibility of obtaining Bi4Ge3O12 with the eulithine crystal structure (ECS) by fusing a stoichiometric mixture of initial oxides and subsequent cooling of the melt by casting was experimentally shown. It is shown that, when using this method, it is possible not only to achieve record rates of synthesis but also to reduce the content of platinum (which is a harmful impurity) in the resulting material by 2 times.
Журнал: Inorganic Materials: Applied Research
Выпуск журнала: Т.14, №2
Номера страниц: 454-460
ISSN журнала: 20751133
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)