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Glass Physics and Chemistry

, Volume 44, Issue 5, pp 423–427 | Cite as

Physicochemical Properties of Nanosized Powders of the LaPO4–DyPO4–H2O System

  • L. P. Mezentseva
  • A. V. Osipov
  • V. L. Ugolkov
  • V. F. Popova
  • T. P. Maslennikova
  • S. K. Kuchaeva
  • A. V. Yakovlev
Article
  • 6 Downloads

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.

Keywords

sol-gel synthesis nanopowders of lanthanum-dysprosium orthophosphates physicochemical analysis specific surface area 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • L. P. Mezentseva
    • 1
  • A. V. Osipov
    • 1
  • V. L. Ugolkov
    • 1
  • V. F. Popova
    • 1
  • T. P. Maslennikova
    • 1
  • S. K. Kuchaeva
    • 1
  • A. V. Yakovlev
    • 1
  1. 1.Grebenshchikov Institute of Silicate ChemistryRussian Academy of SciencesSt. PetersburgRussia

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