Phase stability study of the pseudobinary system Gd2O 3-Nd2O3 (T1350°C)

G. A. Costa, C. Artini, A. Ubaldini, M. M. Carnasciali, P. Mele, R. Masini

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Abstract

The phase stability of the system Gd2O3-Nd 2O3 up to 1350°C was studied. Mixed oxides were synthesized by coprecipitation of mixed oxalates. Depending on the thermal treatment, three possible structures of the oxides, namely the A (hexagonal, P63/mmm), B (monoclinic, C2/m) and C (cubic, Ia3) forms, were obtained. Below 1300°C the system Gd2O3-Nd 2O3 shows three monophasic (A, B and C phase) and three biphasic regions (A+B, B+C and A+C phase). Below 550°C the C phase is stable over the whole composition range. A validation procedure for the existence of the C phase in pure Nd2O3 was also set up.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalJournal of Thermal Analysis and Calorimetry
Volume92
Issue number1
DOIs
Publication statusPublished - 2008 Apr 1

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Keywords

  • Phase stability
  • Rare earth sesquioxides
  • X-ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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