Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La0.6Sr0.4CoO3-δ and La 0.6Sr0.4FeO3-δ

M. Kuhn; K. Sato; K. Yashiro; J. Mizusaki; Shin Ichi Hashimoto

Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La_0.6Sr_0.4CoO_3-δ and La _0.6Sr_0.4FeO_3-δ

M. Kuhn, K. Sato, K. Yashiro, J. Mizusaki, Shin Ichi Hashimoto

Tohoku University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

Oxygen nonstoichiometry and thermo-chemical stability of the perovskite mixed-conductors La_0.6Sr_0.4FeO_3-δ and La_0.6Sr_0.4CoO_3-δ were investigated by coulometric titration and high-temperature gravimetry in the oxygen partial pressure range of log(pO₂/bar)=-28 to 0 at 773 to 1173 K. For both materials, the oxygen content decreased with decreasing oxygen partial pressure and increasing temperature. In the range log(pO₂/bar)=-24 to -10, the oxygen content of La_0.6Sr_0.4FeO_3-δ reached a plateau at δ=[Sr]/2=0.2, corresponding to stoichiometric composition. At lower oxygen partial pressure, the oxygen content further decreased and the material decomposed. La_0.6Sr_0.4CoO _3-δ was found to easily decompose already at higher oxygen partial pressure. The crystal structure of La_0.6Sr _0.4FeO_3-δ and La_0.6Sr _0.4CoO_3-δ was characterized by high-temperature X-ray diffraction in air as a function of temperature. Lattice parameters were calculated for both materials.

Original language	English
Title of host publication	Materials Science and Technology Conference and Exhibition 2010, MS and T'10
Pages	206-213
Number of pages	8
Publication status	Published - 2010
Event	Materials Science and Technology Conference and Exhibition 2010, MS and T'10 - Houston, TX, United States Duration: 2010 Oct 17 → 2010 Oct 21

Publication series

Name	Materials Science and Technology Conference and Exhibition 2010, MS and T'10
Volume	1

Conference

Conference	Materials Science and Technology Conference and Exhibition 2010, MS and T'10
Country/Territory	United States
City	Houston, TX
Period	10/10/17 → 10/10/21

Keywords

High-temperature x-ray diffractometry
Oxygen nonstoichiometry
Strontium doped lanthanum cobaltite
Strontium doped lanthanum ferrite

Cite this

Kuhn, M., Sato, K., Yashiro, K., Mizusaki, J., & Hashimoto, S. I. (2010). Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La_0.6Sr_0.4CoO_3-δ and La _0.6Sr_0.4FeO_3-δ. In Materials Science and Technology Conference and Exhibition 2010, MS and T'10 (pp. 206-213). (Materials Science and Technology Conference and Exhibition 2010, MS and T'10; Vol. 1).

@inproceedings{d7334bb7db6d48f3a5d6a2c301f7914d,

title = "Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La0.6Sr0.4CoO3-δ and La 0.6Sr0.4FeO3-δ",

abstract = "Oxygen nonstoichiometry and thermo-chemical stability of the perovskite mixed-conductors La0.6Sr0.4FeO3-δ and La0.6Sr0.4CoO3-δ were investigated by coulometric titration and high-temperature gravimetry in the oxygen partial pressure range of log(pO2/bar)=-28 to 0 at 773 to 1173 K. For both materials, the oxygen content decreased with decreasing oxygen partial pressure and increasing temperature. In the range log(pO2/bar)=-24 to -10, the oxygen content of La0.6Sr0.4FeO3-δ reached a plateau at δ=[Sr]/2=0.2, corresponding to stoichiometric composition. At lower oxygen partial pressure, the oxygen content further decreased and the material decomposed. La0.6Sr0.4CoO 3-δ was found to easily decompose already at higher oxygen partial pressure. The crystal structure of La0.6Sr 0.4FeO3-δ and La0.6Sr 0.4CoO3-δ was characterized by high-temperature X-ray diffraction in air as a function of temperature. Lattice parameters were calculated for both materials.",

keywords = "High-temperature x-ray diffractometry, Oxygen nonstoichiometry, Strontium doped lanthanum cobaltite, Strontium doped lanthanum ferrite",

author = "M. Kuhn and K. Sato and K. Yashiro and J. Mizusaki and Hashimoto, {Shin Ichi}",

year = "2010",

language = "English",

isbn = "9781617820328",

series = "Materials Science and Technology Conference and Exhibition 2010, MS and T'10",

pages = "206--213",

booktitle = "Materials Science and Technology Conference and Exhibition 2010, MS and T'10",

note = "Materials Science and Technology Conference and Exhibition 2010, MS and T'10 ; Conference date: 17-10-2010 Through 21-10-2010",

}

Kuhn, M, Sato, K , Yashiro, K, Mizusaki, J & Hashimoto, SI 2010, Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La_0.6Sr_0.4CoO_3-δ and La _0.6Sr_0.4FeO_3-δ. in Materials Science and Technology Conference and Exhibition 2010, MS and T'10. Materials Science and Technology Conference and Exhibition 2010, MS and T'10, vol. 1, pp. 206-213, Materials Science and Technology Conference and Exhibition 2010, MS and T'10, Houston, TX, United States, 10/10/17.

Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La_0.6Sr_0.4CoO_3-δ and La _0.6Sr_0.4FeO_3-δ. / Kuhn, M.; Sato, K.; Yashiro, K. et al.
Materials Science and Technology Conference and Exhibition 2010, MS and T'10. 2010. p. 206-213 (Materials Science and Technology Conference and Exhibition 2010, MS and T'10; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Oxygen nonstoichiometry, thermo-chemical stability and crystal structure of La0.6Sr0.4CoO3-δ and La 0.6Sr0.4FeO3-δ

AU - Kuhn, M.

AU - Sato, K.

AU - Yashiro, K.

AU - Mizusaki, J.

AU - Hashimoto, Shin Ichi

PY - 2010

Y1 - 2010

N2 - Oxygen nonstoichiometry and thermo-chemical stability of the perovskite mixed-conductors La0.6Sr0.4FeO3-δ and La0.6Sr0.4CoO3-δ were investigated by coulometric titration and high-temperature gravimetry in the oxygen partial pressure range of log(pO2/bar)=-28 to 0 at 773 to 1173 K. For both materials, the oxygen content decreased with decreasing oxygen partial pressure and increasing temperature. In the range log(pO2/bar)=-24 to -10, the oxygen content of La0.6Sr0.4FeO3-δ reached a plateau at δ=[Sr]/2=0.2, corresponding to stoichiometric composition. At lower oxygen partial pressure, the oxygen content further decreased and the material decomposed. La0.6Sr0.4CoO 3-δ was found to easily decompose already at higher oxygen partial pressure. The crystal structure of La0.6Sr 0.4FeO3-δ and La0.6Sr 0.4CoO3-δ was characterized by high-temperature X-ray diffraction in air as a function of temperature. Lattice parameters were calculated for both materials.

AB - Oxygen nonstoichiometry and thermo-chemical stability of the perovskite mixed-conductors La0.6Sr0.4FeO3-δ and La0.6Sr0.4CoO3-δ were investigated by coulometric titration and high-temperature gravimetry in the oxygen partial pressure range of log(pO2/bar)=-28 to 0 at 773 to 1173 K. For both materials, the oxygen content decreased with decreasing oxygen partial pressure and increasing temperature. In the range log(pO2/bar)=-24 to -10, the oxygen content of La0.6Sr0.4FeO3-δ reached a plateau at δ=[Sr]/2=0.2, corresponding to stoichiometric composition. At lower oxygen partial pressure, the oxygen content further decreased and the material decomposed. La0.6Sr0.4CoO 3-δ was found to easily decompose already at higher oxygen partial pressure. The crystal structure of La0.6Sr 0.4FeO3-δ and La0.6Sr 0.4CoO3-δ was characterized by high-temperature X-ray diffraction in air as a function of temperature. Lattice parameters were calculated for both materials.

KW - High-temperature x-ray diffractometry

KW - Oxygen nonstoichiometry

KW - Strontium doped lanthanum cobaltite

KW - Strontium doped lanthanum ferrite

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M3 - Conference contribution

AN - SCOPUS:79952666417

SN - 9781617820328

T3 - Materials Science and Technology Conference and Exhibition 2010, MS and T'10

SP - 206

EP - 213

BT - Materials Science and Technology Conference and Exhibition 2010, MS and T'10

T2 - Materials Science and Technology Conference and Exhibition 2010, MS and T'10

Y2 - 17 October 2010 through 21 October 2010

ER -