Ceramic Matrix Composites Based on Lanthanum Orthophosphate for Disposal of High-Level Radioactive Waste
- Авторы: Mezentseva L.P.1, Osipov A.V.1, Akatov A.A.2, Doil’nitsyn V.A.2, Pugachev K.E.1, Koptelova L.A.1
-
Учреждения:
- Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
- Saint-Petersburg State Institute of Technology
- Выпуск: Том 45, № 6 (2019)
- Страницы: 565-572
- Раздел: Article
- URL: https://journals.rcsi.science/1087-6596/article/view/217681
- DOI: https://doi.org/10.1134/S1087659620010125
- ID: 217681
Цитировать
Аннотация
Ceramic matrix composites for solidification and disposal of actinide-rare-earth fraction of high-level waste (HLW) were prepared by sintering of nanosized powders of 0.8LaPO4–0.2Al2O3, 0.8LaPO4–0.2Y2O3 and 0.8LaPO4–0.2ZrO2 obtained from 0.8LaPO4 · nH2O–0.2Al(OH)3, 0.8LaPO4 · nH2O–0.2Y(OH)3 and 0.8L-aPO4 · nH2O–0.2ZrO(OH)2 precursors. These powders-precursors were synthesized via sol-gel technique. After heat treatment at 850°C powders of 0.8LaPO4–0.2Al2O3, 0.8LaPO4–0.2Y2O3 and 0.8LaPO4–0.2ZrO2 were obtained. Further powdered compositions were stepwise sintered to prepare ceramic composites which were supposed to be used as matrices for storage of HLW. Rate of La3+, Al3+, Y3+ and Zr4+ leaching from ceramic matrix composites in strength aqueous solutions of NaCl and Na2SO4 simulating underground brine typical for proposed location of HLW geological repository was estimated.
Об авторах
L. Mezentseva
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: la_mez@mail.ru
Россия, St. Petersburg, 199034
A. Osipov
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Email: la_mez@mail.ru
Россия, St. Petersburg, 199034
A. Akatov
Saint-Petersburg State Institute of Technology
Email: la_mez@mail.ru
Россия, St. Petersburg, 190013
V. Doil’nitsyn
Saint-Petersburg State Institute of Technology
Email: la_mez@mail.ru
Россия, St. Petersburg, 190013
K. Pugachev
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Email: la_mez@mail.ru
Россия, St. Petersburg, 199034
L. Koptelova
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Email: la_mez@mail.ru
Россия, St. Petersburg, 199034
Дополнительные файлы
