Phase transformations in fergusonite-type rare earth tantalates

Robert Hughes, Zlatomir Apostolov, Pankaj Sarin, Waltraud Kriven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A range of samples, RETaO4 (RE = Nd, Sm, Gd, Dy, Er, Ho) were synthesized via solid state and solution routes. Two modifications exist at room temperature with the structure being dependent on synthesis method and heat treatment. M-Fergusonite (I2/a) is formed at higher temperatures via solid state methods, whilst the M'-Fergusonites (P2/a) are made at lower temperatures through solution routes. Both modifications transform at high temperatures to a tetragonal phase (I41/a). For M phases this is second order and reversible, whilst for M'-phases the transformation is first order and irreversible. The phase transition behavior has been investigated through high temperature DSC and in situ synchrotron XRD measurements.

Original languageEnglish (US)
Title of host publicationPTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
EditorsLong-Qing Chen, Matthias Militzer, Gianluigi Botton, James Howe, Chadwick Sinclair, Hatem Zurob
PublisherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015
Pages337-342
Number of pages6
ISBN (Electronic)9780692437360
StatePublished - 2015
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015 - Whistler, Canada
Duration: Jun 28 2015Jul 3 2015

Publication series

NamePTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015

Other

OtherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, PTM 2015
Country/TerritoryCanada
CityWhistler
Period6/28/157/3/15

Keywords

  • Ceramic
  • High temperature
  • Phase transformation
  • Rietveld
  • Synchrotron

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Inorganic Chemistry
  • Materials Chemistry
  • Metals and Alloys

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