2008
DOI: 10.1016/j.memsci.2008.03.034
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Oxygen permeation, thermal and chemical expansion of (La, Sr)(Fe, Ga)O3−δ perovskite membranes

Abstract: , et al.. Oxygen permeation, thermal and chemical expansion of (La, Sr)(Fe, Ga)O3-δ perovskite membranes.

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Cited by 52 publications
(33 citation statements)
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“…Also, in many cases the ionic conductivity of heavily doped gallates is lower than that of LSGM, particularly in the intermediate-temperature range and under oxidizing conditions, when the average oxidation state of transition metal cations is higher than 3 þ (Figure 9.8). Nevertheless, optimization of the acceptor-type and variable-valence dopants content makes it possible to develop mixed-conducting membranes with a high oxygen permeability and improved dimensional stability [114][115][116][117]. The disadvantages of LaGaO 3 -based electrolytes and membrane materials include the possible reduction and volatilization of gallium oxide, the relatively high cost of gallium, and significant reactivity with electrodes and catalysts.…”
Section: Transport Properties Of Other Fluorite-related Phases: Selecmentioning
confidence: 99%
“…Also, in many cases the ionic conductivity of heavily doped gallates is lower than that of LSGM, particularly in the intermediate-temperature range and under oxidizing conditions, when the average oxidation state of transition metal cations is higher than 3 þ (Figure 9.8). Nevertheless, optimization of the acceptor-type and variable-valence dopants content makes it possible to develop mixed-conducting membranes with a high oxygen permeability and improved dimensional stability [114][115][116][117]. The disadvantages of LaGaO 3 -based electrolytes and membrane materials include the possible reduction and volatilization of gallium oxide, the relatively high cost of gallium, and significant reactivity with electrodes and catalysts.…”
Section: Transport Properties Of Other Fluorite-related Phases: Selecmentioning
confidence: 99%
“…Hence, this research aimed to characterize the hardness, thermal expansion and oxygen flux of La 1x Sr x Co 0.8 Fe 0.2 O 3+δ with 0 until 40 % Sr substitution effect for lanthanum with 10 % intervals (x = 0.0-0.4). The thermal expansion coefficient of material in the air has a similar tendency with such material thermal expansion coefficient in reducing atmosphere at various temperatures [8]. The crystal structure and thermal stability were also observed to support transport property of oxygen ion of La 1-x Sr x Co 0.8 Fe 0.2 O 3+δ (x = 0.0-0.4).…”
Section: Introductionmentioning
confidence: 57%
“…For practical applications, mixed ionic-electronic conducting oxygen-permeable membranes must exhibit high oxygen permeability while maintaining structural, chemical, and mechanical stability to withstand the harsh working conditions. Co-doping B-site with high valence metal elements, such as Zr, Ga, and Nb, which possess high stabilized energies and are less reducible, is an effective method to improve the stability without greatly impairing the high oxygen permeability [11][12][13]. Makoto and coworkers reported a BaCo 0.7 Fe 0.2 Nb 0.1 O 3−δ (BCFNO) membrane.…”
Section: Introductionmentioning
confidence: 99%