Direct calorimetric measurement of enthalpies of phase transitions at 2000°-2400°C in yttria and zirconia

Alexandra Navrotsky, Luc Benoist, Herve Lefebvre

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

High-temperature differential thermal analysis provided data on phase transitions in zirconia and yttria. The tetragonal form of ZrO2 transforms to the cubic fluorite structure at 2311°±15°C with an enthalpy of 3.4±3.1 kJ/mol. Cubic C-type Y2O3 transforms, probably to the fluorite structure, at 2308°±15°C with ΔH = 47.7±3.0 kJ/mol. This high-temperature polymorph melts at 2382°±15°C with an enthalpy of fusion of 35.6±3.0 kJ/mol.

Original languageEnglish (US)
Pages (from-to)2942-2944
Number of pages3
JournalJournal of the American Ceramic Society
Volume88
Issue number10
StatePublished - Oct 2005
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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