Physicochemical Properties of Nanosized Powders of the LaPO4–DyPO4–H2O System
- Authors: Mezentseva L.P.1, Osipov A.V.1, Ugolkov V.L.1, Popova V.F.1, Maslennikova T.P.1, Kuchaeva S.K.1, Yakovlev A.V.1
-
Affiliations:
- Grebenshchikov Institute of Silicate Chemistry
- Issue: Vol 44, No 5 (2018)
- Pages: 423-427
- Section: Article
- URL: https://journals.rcsi.science/1087-6596/article/view/216710
- DOI: https://doi.org/10.1134/S1087659618050139
- ID: 216710
Cite item
Abstract
Nanosized La1–xDyxPO4 · nH2O powders are synthesized by the sol-gel method using direct and reverse precipitation. The formation of a continuous series of hexagonal solid solutions based on LaPO4 · nH2O is confirmed by the XRD and DSC/TG methods. A continuous series of monoclinic solid solutions based on LaPO4 is formed at temperatures higher than 600°C. A reflex corresponding to a tetragonal form of DyPO4 is formed during the calcination of DyPO4 powder at 850°C. Two types of solid solutions are observed at temperatures of 1000–1200°C, namely, monoclinic solutions based on LaPO4 (to x ≈ 0.7) and tetragonal solutions based on DyPO4 (0.90 ≤ x ≤ 1.0). The results are compared depending on the methods of nanopowder synthesis.
About the authors
L. P. Mezentseva
Grebenshchikov Institute of Silicate Chemistry
Author for correspondence.
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
A. V. Osipov
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
V. L. Ugolkov
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
V. F. Popova
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
T. P. Maslennikova
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
S. K. Kuchaeva
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034
A. V. Yakovlev
Grebenshchikov Institute of Silicate Chemistry
Email: la_mez@mail.ru
Russian Federation, St. Petersburg, 199034