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 language | English |
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Pages (from-to) | 451-454 |
Number of pages | 4 |
Journal | Electrochemistry |
Volume | 68 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2000 Jun |
Keywords
- Mixed Conductor
- Oxygen Nonstoichiometry
- Partial Molar Enthalpy
- Partial Molar Entropy
ASJC Scopus subject areas
- Electrochemistry