Ce3+ concentration in ZrO2-CeO2-Y2O3 system studied by electronic Raman scattering

Takanori Otake; Hiroo Yugami; Hitoshi Naito; Kenichi Kawamura; Tatsuya Kawada; Junichiro Mizusaki

doi:10.1016/S0167-2738(00)00428-8

Ce³⁺ concentration in ZrO₂-CeO₂-Y₂O₃ system studied by electronic Raman scattering

Takanori Otake, Hiroo Yugami, Hitoshi Naito, Kenichi Kawamura, Tatsuya Kawada, Junichiro Mizusaki

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

40 Citations (Scopus)

Abstract

Ceria doped yttria stabilized zirconia (ZrO₂-CeO₂-Y₂O₃ system) shows electron-ion mixed conduction at high temperatures under a reduced atmosphere. In this system, the electronic conductivity is caused by electrons, which may diffuse by hopping conduction between Ce⁴⁺ and Ce³⁺. We applied the electronic Raman scattering technique on the system in order to measure the concentration of Ce³⁺ in samples. For the X = 0.6 and 0.8 samples in [(ZrO₂)_1-X (CeO₂)_X]_0.9(Y₂O₃)_0.1, the oxygen partial pressure dependence of the electronic Raman intensities agrees well with that of the oxygen non-stoichiometry measured by thermogravimetry. From this result, it is confirmed that all of the introduced electrons at reduced condition are trapped at cerium centers in these materials.

Original language	English
Pages (from-to)	663-667
Number of pages	5
Journal	Solid State Ionics
Volume	135
Issue number	1-4
DOIs	https://doi.org/10.1016/S0167-2738(00)00428-8
Publication status	Published - 2000 Nov 1

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Ce3+ concentration in ZrO2-CeO2-Y2O3 system studied by electronic Raman scattering",

abstract = "Ceria doped yttria stabilized zirconia (ZrO2-CeO2-Y2O3 system) shows electron-ion mixed conduction at high temperatures under a reduced atmosphere. In this system, the electronic conductivity is caused by electrons, which may diffuse by hopping conduction between Ce4+ and Ce3+. We applied the electronic Raman scattering technique on the system in order to measure the concentration of Ce3+ in samples. For the X = 0.6 and 0.8 samples in [(ZrO2)1-X (CeO2)X]0.9(Y2O3)0.1, the oxygen partial pressure dependence of the electronic Raman intensities agrees well with that of the oxygen non-stoichiometry measured by thermogravimetry. From this result, it is confirmed that all of the introduced electrons at reduced condition are trapped at cerium centers in these materials.",

author = "Takanori Otake and Hiroo Yugami and Hitoshi Naito and Kenichi Kawamura and Tatsuya Kawada and Junichiro Mizusaki",

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T1 - Ce3+ concentration in ZrO2-CeO2-Y2O3 system studied by electronic Raman scattering

AU - Otake, Takanori

AU - Yugami, Hiroo

AU - Naito, Hitoshi

AU - Kawamura, Kenichi

AU - Kawada, Tatsuya

AU - Mizusaki, Junichiro

PY - 2000/11/1

Y1 - 2000/11/1

N2 - Ceria doped yttria stabilized zirconia (ZrO2-CeO2-Y2O3 system) shows electron-ion mixed conduction at high temperatures under a reduced atmosphere. In this system, the electronic conductivity is caused by electrons, which may diffuse by hopping conduction between Ce4+ and Ce3+. We applied the electronic Raman scattering technique on the system in order to measure the concentration of Ce3+ in samples. For the X = 0.6 and 0.8 samples in [(ZrO2)1-X (CeO2)X]0.9(Y2O3)0.1, the oxygen partial pressure dependence of the electronic Raman intensities agrees well with that of the oxygen non-stoichiometry measured by thermogravimetry. From this result, it is confirmed that all of the introduced electrons at reduced condition are trapped at cerium centers in these materials.

AB - Ceria doped yttria stabilized zirconia (ZrO2-CeO2-Y2O3 system) shows electron-ion mixed conduction at high temperatures under a reduced atmosphere. In this system, the electronic conductivity is caused by electrons, which may diffuse by hopping conduction between Ce4+ and Ce3+. We applied the electronic Raman scattering technique on the system in order to measure the concentration of Ce3+ in samples. For the X = 0.6 and 0.8 samples in [(ZrO2)1-X (CeO2)X]0.9(Y2O3)0.1, the oxygen partial pressure dependence of the electronic Raman intensities agrees well with that of the oxygen non-stoichiometry measured by thermogravimetry. From this result, it is confirmed that all of the introduced electrons at reduced condition are trapped at cerium centers in these materials.

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Ce³⁺ concentration in ZrO₂-CeO₂-Y₂O₃ system studied by electronic Raman scattering

Abstract

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