Synthesis of nanopowders and physicochemical properties of ceramic matrices of the LaPO4–YPO4–(H2O) and LaPO4–HoPO4–(H2O) systems
- Authors: Ugolkov V.L.1, Mezentseva L.P.1, Osipov A.V.1, Popova V.F.1, Maslennikova T.P.1, Akatov A.A.2, Doil’nitsyn V.A.2
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Affiliations:
- Grebenshchikov Institute of Silicate Chemistry
- St. Petersburg State Technological Institute (Technical University)
- Issue: Vol 90, No 1 (2017)
- Pages: 28-33
- Section: Inorganic Synthesis and Industrial Inorganic Chemistry
- URL: https://journals.rcsi.science/1070-4272/article/view/214636
- DOI: https://doi.org/10.1134/S1070427217010050
- ID: 214636
Cite item
Abstract
Sol-gel method was used to synthesize nanosize powders in the LaPO4–YPO4–(H2O) and LaPO4–HoPO4–(H2O) systems. Dense ceramic samples with high microhardness (up to 25 GPa) were formed from these powders by sintering at temperatures of up to 1600°C. The isomorphic capacity of the monoclinic LaPO4 matrix for the second component (yttrium or holmium) simulating radioactive nuclides of the actinide-rare-earth fraction was found to be high. The composites are stable in aqueous solutions, which is indicated by the low concentration of lanthanum and yttrium ions during leaching test (~10–7 g L–1). The results obtained in the study can be used to develop new high-efficiency ceramic matrices for solidification of the actinide-rare-earth fraction of liquid wastes formed in processing of the spent nuclear fuel.
About the authors
V. L. Ugolkov
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, nab. Makarova 2, St. Petersburg, 199034
L. P. Mezentseva
Grebenshchikov Institute of Silicate Chemistry
Author for correspondence.
Email: la_mez@mail.ru
Russian Federation, nab. Makarova 2, St. Petersburg, 199034
A. V. Osipov
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, nab. Makarova 2, St. Petersburg, 199034
V. F. Popova
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, nab. Makarova 2, St. Petersburg, 199034
T. P. Maslennikova
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, nab. Makarova 2, St. Petersburg, 199034
A. A. Akatov
St. Petersburg State Technological Institute (Technical University)
Email: la_mez@mail.ru
Russian Federation, Moskovskii pr. 26, St. Petersburg, 190013
V. A. Doil’nitsyn
St. Petersburg State Technological Institute (Technical University)
Email: la_mez@mail.ru
Russian Federation, Moskovskii pr. 26, St. Petersburg, 190013
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