Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-d perovskite oxide probed by electrical conductivity relaxation

S. Yakovlev; S. Yakovlev; C.-Y. Yoo; S. Fang; Henricus J.M. Bouwmeester

doi:10.1063/1.3455908

Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-d perovskite oxide probed by electrical conductivity relaxation

S. Yakovlev, S. Yakovlev, C.-Y. Yoo, S. Fang, Henricus J.M. Bouwmeester

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Abstract

Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at which temperature the cubic polymorph is stable, electrical conductivity relaxation experiments are conducted during long-term annealing at 1073 K. The decreases in the surface exchange and chemical diffusion coefficients with time due to the sluggish phase transition are found to be correlated. It is demonstrated that B-site doping with Zr to an amount as low as 3 mol % stabilizes the high-temperature perovskite cubic phase of Ba0.5Sr0.5Co0.8Fe0.2O3−δ, with preservation of its high oxygen transport and exchange properties.

Original language	Undefined
Pages (from-to)	254101-
Journal	Applied physics letters
Volume	96
Issue number	25
DOIs	https://doi.org/10.1063/1.3455908
Publication status	Published - 2010

Keywords

METIS-266949
IR-76526

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1063/1.3455908

Cite this

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title = "Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-d perovskite oxide probed by electrical conductivity relaxation",

abstract = "Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at which temperature the cubic polymorph is stable, electrical conductivity relaxation experiments are conducted during long-term annealing at 1073 K. The decreases in the surface exchange and chemical diffusion coefficients with time due to the sluggish phase transition are found to be correlated. It is demonstrated that B-site doping with Zr to an amount as low as 3 mol % stabilizes the high-temperature perovskite cubic phase of Ba0.5Sr0.5Co0.8Fe0.2O3−δ, with preservation of its high oxygen transport and exchange properties.",

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year = "2010",

doi = "10.1063/1.3455908",

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TY - JOUR

T1 - Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3-d perovskite oxide probed by electrical conductivity relaxation

AU - Yakovlev, S.

AU - Yoo, C.-Y.

AU - Fang, S.

AU - Bouwmeester, Henricus J.M.

PY - 2010

Y1 - 2010

N2 - Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at which temperature the cubic polymorph is stable, electrical conductivity relaxation experiments are conducted during long-term annealing at 1073 K. The decreases in the surface exchange and chemical diffusion coefficients with time due to the sluggish phase transition are found to be correlated. It is demonstrated that B-site doping with Zr to an amount as low as 3 mol % stabilizes the high-temperature perovskite cubic phase of Ba0.5Sr0.5Co0.8Fe0.2O3−δ, with preservation of its high oxygen transport and exchange properties.

AB - Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at which temperature the cubic polymorph is stable, electrical conductivity relaxation experiments are conducted during long-term annealing at 1073 K. The decreases in the surface exchange and chemical diffusion coefficients with time due to the sluggish phase transition are found to be correlated. It is demonstrated that B-site doping with Zr to an amount as low as 3 mol % stabilizes the high-temperature perovskite cubic phase of Ba0.5Sr0.5Co0.8Fe0.2O3−δ, with preservation of its high oxygen transport and exchange properties.

KW - METIS-266949

KW - IR-76526

U2 - 10.1063/1.3455908

DO - 10.1063/1.3455908

M3 - Article

SN - 0003-6951

VL - 96

SP - 254101-

JO - Applied physics letters

JF - Applied physics letters

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