TY - JOUR
T1 - Oxygen sorption-desorption properties and orderdisorder transitions on LaSrCoFe perovskite-type oxides
AU - Kaneko, Tomoya
AU - Nosue, Kohei
AU - Uchiyama, Tomoki
AU - Nagano, Masaru
AU - Ankei, Naoki
AU - Kamitani, Kazutaka
AU - Nishibori, Maiko
N1 - Funding Information:
We would like to thank Dr. T. Watanabe of JASRI for the useful discussion and technical support. The SR-XRD measurements were conducted at BL19B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (proposal no. 2016B1882). This work was partially supported by the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
Funding Information:
Acknowledgement We would like to thank Dr. T. Watanabe of JASRI for the useful discussion and technical support. The SR-XRD measurements were conducted at BL19B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (proposal no. 2016B1882). This work was partially supported by the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
Publisher Copyright:
© 2019 The Ceramic Society of Japan. All rights reserved.
PY - 2019/6
Y1 - 2019/6
N2 - The oxygen non-stoichiometry (¤) and structural properties of a brownmillerite-type oxide of La0.1Sr0.9Co0.9Fe0.1O3¤ (LSCF1991) during oxygen sorption/desorption were investigated by simultaneously applying a temperature-programmed technique and high-temperature X-ray diffraction. The structural changes of perovskite-type (P-type) to brownmillerite-type (B-type) and B-type to P-type occurred within limited p(O2) ranges, and a B-type phase-stable region was observed in the presence of oxygen at high temperature. Moreover, P-type LSCF1991 changed into B-type LSCF1991 through tetragonal P-type LSCF1991 as an intermediate phase. B-type LSCF1991 showed repeating structural changes with a certain limited p(O2), which is 0.5% < p(O2) < 1.0%, whereas such changes could not be observed at p(O2) > 1.0%. These behaviors correspond with the temperature programmed desorption of oxygen profiles, as well as the amount of lattice oxygen (3¤). The p(O2) dependence of the structural change will provide a basis for a further investigation into the durability of an oxygen-permeated membrane by predicting the strain across the membrane under practical conditions.
AB - The oxygen non-stoichiometry (¤) and structural properties of a brownmillerite-type oxide of La0.1Sr0.9Co0.9Fe0.1O3¤ (LSCF1991) during oxygen sorption/desorption were investigated by simultaneously applying a temperature-programmed technique and high-temperature X-ray diffraction. The structural changes of perovskite-type (P-type) to brownmillerite-type (B-type) and B-type to P-type occurred within limited p(O2) ranges, and a B-type phase-stable region was observed in the presence of oxygen at high temperature. Moreover, P-type LSCF1991 changed into B-type LSCF1991 through tetragonal P-type LSCF1991 as an intermediate phase. B-type LSCF1991 showed repeating structural changes with a certain limited p(O2), which is 0.5% < p(O2) < 1.0%, whereas such changes could not be observed at p(O2) > 1.0%. These behaviors correspond with the temperature programmed desorption of oxygen profiles, as well as the amount of lattice oxygen (3¤). The p(O2) dependence of the structural change will provide a basis for a further investigation into the durability of an oxygen-permeated membrane by predicting the strain across the membrane under practical conditions.
KW - Oxygen permeation
KW - Partial pressure of oxygen
KW - Perovskite-type oxide
KW - Phase transition
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U2 - 10.2109/jcersj2.19033
DO - 10.2109/jcersj2.19033
M3 - Article
AN - SCOPUS:85067406598
SN - 1882-0743
VL - 127
SP - 378
EP - 382
JO - Journal of the Ceramic Society of Japan
JF - Journal of the Ceramic Society of Japan
IS - 6
ER -