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 journalArticle

Abstract

The dissolution enthalpy, ΔHDS, and the formation enthalpy, ΔHf,ox, of bulk lutetium-doped cerium oxide (LuDC) were studied at 701°C in molten sodium molybdate. For the composition range of Ce1−XLuXO2−X/2, studied 0 ≤ X ≤ 0.3, the ΔHDS decreases linearly and smoothly with lutetium content according to ΔHDS, kJ/mol = 73.5(1.0)−165.1(5.5)·x). The enthalpy of formation, ΔHf,ox, becomes more exothermic linearly with lutetium content. No anomaly in ΔHf,ox is observed at low Lu2O3 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
Volume101
Issue number8
DOIs
Publication statusPublished - Aug 1 2018

Fingerprint

lutetium
Lutetium
enthalpy
Enthalpy
energetics
cerium
Cerium compounds
Cerium
Rare earths
Molten materials
microstructure
Dissolution
dissolution
Sodium
sodium
oxide
anomaly
Microstructure
Oxides
Processing

Keywords

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

ASJC Scopus subject areas

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

Cite this

Energetics of bulk lutetium-doped Ce1−xLuxO2−x/2 compounds. / Yavo, Nimrod; Sharma, Geetu; Kimmel, Giora; Lubomirsky, Igor; Navrotsky, Alexandra; Yeheskel, Ori.

In: Journal of the American Ceramic Society, Vol. 101, No. 8, 01.08.2018, p. 3520-3526.

Research output: Contribution to journalArticle

Yavo, N, Sharma, G, Kimmel, G, Lubomirsky, I, Navrotsky, A & Yeheskel, O 2018, 'Energetics of bulk lutetium-doped Ce1−xLuxO2−x/2 compounds', Journal of the American Ceramic Society, vol. 101, no. 8, pp. 3520-3526. https://doi.org/10.1111/jace.15489
Yavo, Nimrod ; Sharma, Geetu ; Kimmel, Giora ; Lubomirsky, Igor ; Navrotsky, Alexandra ; Yeheskel, Ori. / Energetics of bulk lutetium-doped Ce1−xLuxO2−x/2 compounds. In: Journal of the American Ceramic Society. 2018 ; Vol. 101, No. 8. pp. 3520-3526.
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