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.
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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.
Mezentseva, L.P., Osipov, A.V., Akatov, A.A., Doil’nitsyn, V.A., Ugolkov, V.L., Popova, V.F., Maslennikova, T.P., and Drozdova, I.A., Chemical and thermal stability of phosphate ceramic matrices, Glass Phys. Chem., 2017, vol. 43, no. 1, pp. 83–90.
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.
Mezentseva, L.P., Kruchinina, I.Yu., Osipov, A.V., Ugolkov, V.L., Popova, V.F., and Kuchaeva, S.K., Physical-chemical properties of nanopowders and ceramic samples of REE orthophosphates, Glass Phys. Chem., 2017, vol. 43, no. 1, pp. 98–105.
Hikichi, Y., Sasaki, T., Suzuki, S., Murayama, K., and Miyamoto, M., Thermal reactions of hydrated hexagonal RPO4 · nH2O (R = Tb or Dy, n = 0.5 to 1), J. Am. Ceram. Soc., 1988, vol. 71, no. 7, pp. C–354–C–355.
Boakye, E.E., Mogilevsky, P., Hay, R.S., and Fair, G.I., Synthesis and phase composition of lanthanide phosphate nanoparticles LnPO4 (Ln = La, Gd, Tb, Dy, Y) and solid solutions for fiber coatings, J. Am. Ceram. Soc., 2008, vol. 91, no. 12, pp. 3841–3849.
Fang, Y.-P., Xu, A.-W., Song, R.-Q., Zhang, H.-X., You, L.-P., Yu, J.C., and Liu, H.-Q., Systematic synthesis and characterization of single-crystal lanthanide orthophosphate nanowires, J. Am. Chem. Soc., 2003, vol. 125, no. 51, pp. 16025–16034.
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Original Russian Text © L.P. Mezentseva, A.V. Osipov, V.L. Ugolkov, V.F. Popova, T.P. Maslennikova, S.K. Kuchaeva, A.V. Yakovlev, 2018, published in Fizika i Khimiya Stekla.
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Mezentseva, L.P., Osipov, A.V., Ugolkov, V.L. et al. Physicochemical Properties of Nanosized Powders of the LaPO4–DyPO4–H2O System. Glass Phys Chem 44, 423–427 (2018). https://doi.org/10.1134/S1087659618050139
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DOI: https://doi.org/10.1134/S1087659618050139