Slow relaxation kinetics of Sr(Zr, Y)O3 in wet atmosphere

Takao Kudo; Keiji Yashiro; Hiroshige Matsumoto; Kazuhisa Sato; Tatsuya Kawada; Junichiro Mizusaki

doi:10.1016/j.ssi.2008.02.011

Slow relaxation kinetics of Sr(Zr, Y)O₃ in wet atmosphere

Takao Kudo, Keiji Yashiro, Hiroshige Matsumoto, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

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

15 Citations (Scopus)

Abstract

The electrical conductivity of SrZr_0.9Y_0.1O_{3 - δ} was measured as a function of temperature and gas partial pressure. Extremely slow conductivity relaxation was observed below 973 K. This is attributed to slow water incorporation/evolution reaction. Unexpectedly, measured electrical conductivities increased with decrease in temperature at temperatures lower than 1023 K. Proton and oxide ion conductivities were deconvoluted from the total conductivity by simple defect-chemical analysis. At low temperatures, the actual proton conductivity was found to be several times higher than those reported.

Original language	English
Pages (from-to)	851-854
Number of pages	4
Journal	Solid State Ionics
Volume	179
Issue number	21-26
DOIs	https://doi.org/10.1016/j.ssi.2008.02.011
Publication status	Published - 2008 Sept 15

Keywords

Electrical conductivity
Proton conductor
Slow relaxation process
Strontium zirconate
Water vapor pressure

ASJC Scopus subject areas

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

Access to Document

10.1016/j.ssi.2008.02.011

Cite this

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title = "Slow relaxation kinetics of Sr(Zr, Y)O3 in wet atmosphere",

abstract = "The electrical conductivity of SrZr0.9Y0.1O3 - δ was measured as a function of temperature and gas partial pressure. Extremely slow conductivity relaxation was observed below 973 K. This is attributed to slow water incorporation/evolution reaction. Unexpectedly, measured electrical conductivities increased with decrease in temperature at temperatures lower than 1023 K. Proton and oxide ion conductivities were deconvoluted from the total conductivity by simple defect-chemical analysis. At low temperatures, the actual proton conductivity was found to be several times higher than those reported.",

keywords = "Electrical conductivity, Proton conductor, Slow relaxation process, Strontium zirconate, Water vapor pressure",

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T1 - Slow relaxation kinetics of Sr(Zr, Y)O3 in wet atmosphere

AU - Kudo, Takao

AU - Yashiro, Keiji

AU - Matsumoto, Hiroshige

AU - Sato, Kazuhisa

AU - Kawada, Tatsuya

AU - Mizusaki, Junichiro

PY - 2008/9/15

Y1 - 2008/9/15

N2 - The electrical conductivity of SrZr0.9Y0.1O3 - δ was measured as a function of temperature and gas partial pressure. Extremely slow conductivity relaxation was observed below 973 K. This is attributed to slow water incorporation/evolution reaction. Unexpectedly, measured electrical conductivities increased with decrease in temperature at temperatures lower than 1023 K. Proton and oxide ion conductivities were deconvoluted from the total conductivity by simple defect-chemical analysis. At low temperatures, the actual proton conductivity was found to be several times higher than those reported.

AB - The electrical conductivity of SrZr0.9Y0.1O3 - δ was measured as a function of temperature and gas partial pressure. Extremely slow conductivity relaxation was observed below 973 K. This is attributed to slow water incorporation/evolution reaction. Unexpectedly, measured electrical conductivities increased with decrease in temperature at temperatures lower than 1023 K. Proton and oxide ion conductivities were deconvoluted from the total conductivity by simple defect-chemical analysis. At low temperatures, the actual proton conductivity was found to be several times higher than those reported.

KW - Electrical conductivity

KW - Proton conductor

KW - Slow relaxation process

KW - Strontium zirconate

KW - Water vapor pressure

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