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 language||English (US)|
|Number of pages||3|
|Journal||Journal of the American Ceramic Society|
|State||Published - Oct 2005|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry