Energetics of bulk lutetium-doped Ce1-xLuxO2-x/2 compounds

Nimrod Yavo, Geetu Sharma, Giora Kimmel, Igor Lubomirsky, Alexandra Navrotsky, Ori Yeheskel

Research output: Contribution to journalArticlepeer-review


The dissolution enthalpy, ΔH DS, and the formation enthalpy, ΔH f,ox, of bulk lutetium-doped cerium oxide (LuDC) were studied at 701°C in molten sodium molybdate. For the composition range of Ce 1−XLu XO 2−X/2, studied 0 ≤ X ≤ 0.3, the ΔH DS decreases linearly and smoothly with lutetium content according to ΔH DS, kJ/mol = 73.5(1.0)−165.1(5.5)·x). The enthalpy of formation, ΔH f,ox, becomes more exothermic linearly with lutetium content. No anomaly in ΔH f,ox is observed at low Lu 2O 3 concentration as reported previously for several other rare-earth-doped ceria systems, suggesting possible differences in clustering and microstructure, which may also be related to difference in processing conditions.

Original languageEnglish
Pages (from-to)3520-3526
Number of pages7
JournalJournal of the American Ceramic Society
Issue number8
StatePublished - Aug 2018


  • cerium/cerium compounds
  • dopants/doping
  • oxides
  • thermodynamics

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry


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