Physicochemical Properties of Nanosized Powders of the LaPO4–DyPO4–H2O System
- 6 Downloads
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.
Keywordssol-gel synthesis nanopowders of lanthanum-dysprosium orthophosphates physicochemical analysis specific surface area
Unable to display preview. Download preview PDF.
- 1.Ugolkov, V.L., Mezentseva, L.P., Osipov, A.V., Popova, V.F., Maslennikova, T.P., Akatov, A.A., and Doil’nitsyn, V.A., Synthesis of nanopowders and physicochemical properties of ceramic matrices of the LaPO4–YPO4–(H2O) and LaPO4–HoPO4–(H2O) systems, Russ. J. Appl. Chem., 2017, vol. 90, no. 1, pp. 28–33.CrossRefGoogle Scholar
- 3.Mezentseva, L., Osipov, A., Ugolkov, V., Akatov, A., Doil’nitsyn, V., Maslennikova, T., and Yakovlev, A., Synthesis and thermal behavior of nanopowders in LaPO4–YPO4(–H2O), LaPO4–LuPO4(–H2O) and YPO4–ScPO4(–H2O) systems for ceramic matrices, J. Nanomed. Res., 2017, vol. 6, no.1.Google Scholar