Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-d measured by in-situ neutron diffraction

Steven McIntosh; Jaap F. Vente; Wim G. Haije; Dave H.A. Blank; Henny J.M. Bouwmeester

doi:10.1021/cm052763x

Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-d measured by in-situ neutron diffraction

Steven McIntosh, Jaap F. Vente, Wim G. Haije, Dave H.A. Blank, Henny J.M. Bouwmeester

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Abstract

The structure, oxygen stoichiometry, and chemical and thermal expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-ä (BSCF) between 873 and 1173 K and oxygen partial pressures of 1 10-3 to 1 atm were determined by in situ neutron diffraction. BSCF has a cubic perovskite structure, space group Pm3hm, across the whole T-pO2 region investigated. The material is highly oxygen deficient with a maximum oxygen stoichiometry (3 - ä) of 2.339(12) at 873 K and a pO2 of 1 atm and a minimum of 2.192(15) at 1173 K and a pO2 of 10-3 atm. Good agreement is obtained between oxygen stoichiometry data determined by neutron diffraction and thermogravimetry. In the range covered by the experiments, the thermal and chemical expansion coefficients are 19.0(5)-20.8(6) 10-6 K-1 and 0.016(2)-0.026(4), respectively

Original language	English
Pages (from-to)	2187-2193
Number of pages	7
Journal	Chemistry of materials
Volume	18
Issue number	8
DOIs	https://doi.org/10.1021/cm052763x
Publication status	Published - 2006

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@article{2913418250f94c8db2ac3e424edcdea6,

title = "Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-d measured by in-situ neutron diffraction",

abstract = "The structure, oxygen stoichiometry, and chemical and thermal expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-{\"a} (BSCF) between 873 and 1173 K and oxygen partial pressures of 1 10-3 to 1 atm were determined by in situ neutron diffraction. BSCF has a cubic perovskite structure, space group Pm3hm, across the whole T-pO2 region investigated. The material is highly oxygen deficient with a maximum oxygen stoichiometry (3 - {\"a}) of 2.339(12) at 873 K and a pO2 of 1 atm and a minimum of 2.192(15) at 1173 K and a pO2 of 10-3 atm. Good agreement is obtained between oxygen stoichiometry data determined by neutron diffraction and thermogravimetry. In the range covered by the experiments, the thermal and chemical expansion coefficients are 19.0(5)-20.8(6) 10-6 K-1 and 0.016(2)-0.026(4), respectively",

author = "Steven McIntosh and Vente, {Jaap F.} and Haije, {Wim G.} and Blank, {Dave H.A.} and Bouwmeester, {Henny J.M.}",

year = "2006",

doi = "10.1021/cm052763x",

language = "English",

volume = "18",

pages = "2187--2193",

journal = "Chemistry of materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "8",

}

TY - JOUR

T1 - Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-d measured by in-situ neutron diffraction

AU - McIntosh, Steven

AU - Vente, Jaap F.

AU - Haije, Wim G.

AU - Blank, Dave H.A.

AU - Bouwmeester, Henny J.M.

PY - 2006

Y1 - 2006

N2 - The structure, oxygen stoichiometry, and chemical and thermal expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-ä (BSCF) between 873 and 1173 K and oxygen partial pressures of 1 10-3 to 1 atm were determined by in situ neutron diffraction. BSCF has a cubic perovskite structure, space group Pm3hm, across the whole T-pO2 region investigated. The material is highly oxygen deficient with a maximum oxygen stoichiometry (3 - ä) of 2.339(12) at 873 K and a pO2 of 1 atm and a minimum of 2.192(15) at 1173 K and a pO2 of 10-3 atm. Good agreement is obtained between oxygen stoichiometry data determined by neutron diffraction and thermogravimetry. In the range covered by the experiments, the thermal and chemical expansion coefficients are 19.0(5)-20.8(6) 10-6 K-1 and 0.016(2)-0.026(4), respectively

AB - The structure, oxygen stoichiometry, and chemical and thermal expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-ä (BSCF) between 873 and 1173 K and oxygen partial pressures of 1 10-3 to 1 atm were determined by in situ neutron diffraction. BSCF has a cubic perovskite structure, space group Pm3hm, across the whole T-pO2 region investigated. The material is highly oxygen deficient with a maximum oxygen stoichiometry (3 - ä) of 2.339(12) at 873 K and a pO2 of 1 atm and a minimum of 2.192(15) at 1173 K and a pO2 of 10-3 atm. Good agreement is obtained between oxygen stoichiometry data determined by neutron diffraction and thermogravimetry. In the range covered by the experiments, the thermal and chemical expansion coefficients are 19.0(5)-20.8(6) 10-6 K-1 and 0.016(2)-0.026(4), respectively

U2 - 10.1021/cm052763x

DO - 10.1021/cm052763x

M3 - Article

SN - 0897-4756

VL - 18

SP - 2187

EP - 2193

JO - Chemistry of materials

JF - Chemistry of materials

IS - 8

ER -

Oxygen stoichiometry and chemical expansion of Ba0.5Sr0.5Co0.8Fe0.2O3-d measured by in-situ neutron diffraction

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