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

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

doi:10.5796/electrochemistry.68.451

Nonstoichiometry of Zr_0.164Ce_0.654Y_0.182O_1.91-δ

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

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Nonstoichiometry of fluorite-type oxide solid solutions Zr_0.164Ce_0.654Y_0.182O_{1.91 - 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 Zr_0.164Ce_0.654Y_0.182O_{1.91 - 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
Pages (from-to)	451-454
Number of pages	4
Journal	Electrochemistry
Volume	68
Issue number	6
DOIs	https://doi.org/10.5796/electrochemistry.68.451
Publication status	Published - 2000 Jun

Keywords

Mixed Conductor
Oxygen Nonstoichiometry
Partial Molar Enthalpy
Partial Molar Entropy

ASJC Scopus subject areas

Electrochemistry

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title = "Nonstoichiometry of Zr0.164Ce0.654Y0.182O1.91-δ",

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.",

keywords = "Mixed Conductor, Oxygen Nonstoichiometry, Partial Molar Enthalpy, Partial Molar Entropy",

author = "Takanori Otake and Hiroo Yugami and Kenichi Kawamura and Yutaka Nigara and Tatsuya Kawada and Junichiro Mizusaki",

year = "2000",

month = jun,

doi = "10.5796/electrochemistry.68.451",

language = "English",

volume = "68",

pages = "451--454",

journal = "Electrochemistry",

issn = "1344-3542",

publisher = "Electrochemical Society of Japan",

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AU - Otake, Takanori

AU - Yugami, Hiroo

AU - Kawamura, Kenichi

AU - Nigara, Yutaka

AU - Kawada, Tatsuya

AU - Mizusaki, Junichiro

PY - 2000/6

Y1 - 2000/6

N2 - 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.

AB - 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.

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