Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1-yAlyO3-δ

Junichiro Mizusaki; Mamoru Hasegawa; Keiji Yashiro; Hiroshige Matsumoto; Tatsuya Kawada

doi:10.1016/j.ssi.2006.06.001

Nonstoichiometry of the perovskite-type solid solution La_0.9Ca_0.1Cr_1-yAl_yO_3-δ

Junichiro Mizusaki, Mamoru Hasegawa, Keiji Yashiro, Hiroshige Matsumoto, Tatsuya Kawada

ENV - Environmental Studies for Advanced Society

Tohoku University

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

16 Citations (Scopus)

Abstract

Nonstoichiometry of the perovskite-type solid solutions La_0.9Ca_0.1Cr_1-yAl_yO_3-δ was studied by high-temperature gravimetry under controlled P(O₂) atmospheres of 1-10^{- 23} bar at 1073-1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of V_Ö{radical dot}{radical dot}, Cr_Cr.{radical dot}, Ca_La,, and Al_Cr^X. With the increase in y, V_Ö{radical dot}{radical dot} formation becomes much easier. For y > 0.8, some fraction of Ca_La, becomes surrounded only by Al_Cr^X and V_Ö{radical dot}{radical dot} remains around such Ca_La, up to high P(O₂) to reduce the maximum oxygen content below 3.000.

Original language	English
Pages (from-to)	1925-1928
Number of pages	4
Journal	Solid State Ionics
Volume	177
Issue number	19-25 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2006.06.001
Publication status	Published - 2006 Oct 15

Keywords

(La,Ca)(Cr, Al)O
B-site mixing effect
Defect structure
Nonstoichiometry
Perovskite-type oxide

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10.1016/j.ssi.2006.06.001

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@article{62a904e006ec43c2ae1d2e875b306bdb,

title = "Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1-yAlyO3-δ",

abstract = "Nonstoichiometry of the perovskite-type solid solutions La0.9Ca0.1Cr1-yAlyO3-δ was studied by high-temperature gravimetry under controlled P(O2) atmospheres of 1-10- 23 bar at 1073-1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of V{\"O}{radical dot}{radical dot}, CrCr.{radical dot}, CaLa,, and AlCrX. With the increase in y, V{\"O}{radical dot}{radical dot} formation becomes much easier. For y > 0.8, some fraction of CaLa, becomes surrounded only by AlCrX and V{\"O}{radical dot}{radical dot} remains around such CaLa, up to high P(O2) to reduce the maximum oxygen content below 3.000.",

keywords = "(La,Ca)(Cr, Al)O, B-site mixing effect, Defect structure, Nonstoichiometry, Perovskite-type oxide",

author = "Junichiro Mizusaki and Mamoru Hasegawa and Keiji Yashiro and Hiroshige Matsumoto and Tatsuya Kawada",

note = "Funding Information: The authors express their thanks to Dr. Mori of Central Research Institute of Electric Power Industry for providing the sample La 0.9 Ca 0.1 Cr 0.9 Al 0.1 O 3−δ . This study was the Grant-in-Aid for Scientific Research (A), 13305046 by the Ministry of Education, Science, Sports and Culture.",

year = "2006",

month = oct,

day = "15",

doi = "10.1016/j.ssi.2006.06.001",

language = "English",

volume = "177",

pages = "1925--1928",

journal = "Solid State Ionics",

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number = "19-25 SPEC. ISS.",

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T1 - Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1-yAlyO3-δ

AU - Mizusaki, Junichiro

AU - Hasegawa, Mamoru

AU - Yashiro, Keiji

AU - Matsumoto, Hiroshige

AU - Kawada, Tatsuya

N1 - Funding Information: The authors express their thanks to Dr. Mori of Central Research Institute of Electric Power Industry for providing the sample La 0.9 Ca 0.1 Cr 0.9 Al 0.1 O 3−δ . This study was the Grant-in-Aid for Scientific Research (A), 13305046 by the Ministry of Education, Science, Sports and Culture.

PY - 2006/10/15

Y1 - 2006/10/15

N2 - Nonstoichiometry of the perovskite-type solid solutions La0.9Ca0.1Cr1-yAlyO3-δ was studied by high-temperature gravimetry under controlled P(O2) atmospheres of 1-10- 23 bar at 1073-1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of VÖ{radical dot}{radical dot}, CrCr.{radical dot}, CaLa,, and AlCrX. With the increase in y, VÖ{radical dot}{radical dot} formation becomes much easier. For y > 0.8, some fraction of CaLa, becomes surrounded only by AlCrX and VÖ{radical dot}{radical dot} remains around such CaLa, up to high P(O2) to reduce the maximum oxygen content below 3.000.

AB - Nonstoichiometry of the perovskite-type solid solutions La0.9Ca0.1Cr1-yAlyO3-δ was studied by high-temperature gravimetry under controlled P(O2) atmospheres of 1-10- 23 bar at 1073-1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of VÖ{radical dot}{radical dot}, CrCr.{radical dot}, CaLa,, and AlCrX. With the increase in y, VÖ{radical dot}{radical dot} formation becomes much easier. For y > 0.8, some fraction of CaLa, becomes surrounded only by AlCrX and VÖ{radical dot}{radical dot} remains around such CaLa, up to high P(O2) to reduce the maximum oxygen content below 3.000.

KW - (La,Ca)(Cr, Al)O

KW - B-site mixing effect

KW - Defect structure

KW - Nonstoichiometry

KW - Perovskite-type oxide

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Nonstoichiometry of the perovskite-type solid solution La_0.9Ca_0.1Cr_1-yAl_yO_3-δ

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