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Characterization of aluminophosphate-based glass and glass-crystalline nuclear waste forms and cesium speciation in their structureстатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из перечня ВАКСтатья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 января 2020 г.
- Авторы: Stefanovsky S.V., Nikonov B.S., Remizov M.B., Kozlov P.V., Belanova E.A., Shiryaev A.A., Zubavichus Ya V.
- Журнал: Физика и химия обработки материалов
- Номер: 5
- Год издания: 2014
- Издательство: Интерконтакт Наука
- Местоположение издательства: М.
- Первая страница: 74
- Последняя страница: 81
- Аннотация: Aluminophosphate based glasses designed for immobilization of high level waste from reprocessing of spent fuel from the water-graphite channel reactors were produced and characterized using X-ray diffraction and scanning electron microscopy. Cs environment in the structure of the materials was studied by X-ray absorption fine structure. Melts quenched onto a metal plate formed glasses but their annealing at 500°C for 14 h resulted in partial crystallization of aluminum orthophosphates and complex sodium-cesium-(magnesium)-aluminum orthophosphates with variable Cs2O and MgO contents. Maximum Cs2O concentration in the complex orthophosphate reached 26.0 wt.% or 0.32 Cs formula units (Na0.39Cs0.32Mg0.26Al0.47P1.04Mo0.02O4.00). The first coordination shell of Cs is split into at least two components corresponding to Cs–O distances of 3.12±0.05 Å and 3.44±0.05 Å. In some annealed samples a second Cs coordination shell appears due to Cs incorporation in crystalline phases.
- Добавил в систему: Стефановский Сергей Владимирович