Nonstoichiometry of Zr0.164Ce0.654Y0.182O1.91-δ

Takanori Otake, Hiroo Yugami, Kenichi Kawamura, Yutaka Nigara, Tatsuya Kawada, Junichiro Mizusaki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Nonstoichiometry of fluorite-type oxide solid solutions Zr0.164Ce0.654Y0.182O1.91 - δ was measured as a function of temperature (T = 973-1273 K) and oxygen partial pressure (P(O2) = 10-2-10-24 atm) using thermogravimetry. The experimental date was well reproduced by the regular solution model. From the δ-logP(O2)-T relationship, the partial molar enthalpy (ho-ho̊) and the partial molar entropy (so - so̊) of oxygen in Zr0.164Ce0.654Y0.182O1.91 - δ were also determined as a function of δ. The (so-so̊) agrees well with theoretical calculation using the random configuration. The δ dependence of (ho-ho̊) can be attributed to origin of the deviation from ideal solution behavior of this system.

Original languageEnglish
Pages (from-to)451-454
Number of pages4
JournalElectrochemistry
Volume68
Issue number6
DOIs
Publication statusPublished - 2000 Jun

Keywords

  • Mixed Conductor
  • Oxygen Nonstoichiometry
  • Partial Molar Enthalpy
  • Partial Molar Entropy

ASJC Scopus subject areas

  • Electrochemistry

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