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- W1988484614 abstract "2 Perovskite Fluorite abstract Dual-phase membranes made of fluorite-type ionic conductors and perovskite-type mixed ionic- electronic conductors (MIEC) have attracted wide attentions in recent years. Here, we report dual- phase membranes, which are made of a ceria-based oxygen ionic conducting oxide (Ce0.8Sm0.2O1.9) and Ca-doped MIEC perovskite oxides (Sm0.6Ca0.4CoO3� δ and Sm0.6Ca0.4FeO3 � δ), and show high structural stability and permeation fluxes. The cobalt- and iron-containing dual-phase membranes were compara- tively investigated to find the dependence of the dual-phase membrane properties, such as membrane microstructure, conductivity, oxygen flux as well as stability under a CO2 environment, on B-site elements (Co and Fe) of perovskite phase. It is found that the weight ratio of Sm0.6Ca0.4CoO3 � δ phase should be no less than 33 wt%; otherwise, the electronic conductivity of the corresponding dual-phase membranes is insufficient for oxygen permeation. However, a lower weight ratio (25 wt%) of Sm0.6Ca0.4FeO3� δ phase offers sufficient electronic conductivities for oxygen permeation through the dual-phase membranes. The significant difference in the minimum weight ratio of the two perovskite phases in dual-phase membranes results from the different microstructures developed during the high- temperature sintering process. All the dual-phase membranes are stable under CO2 sweep and show high oxygen permeation flux up to 0.55 mL cm � 2 min � 1 at 950 1C through 0.5 mm thick membranes." @default.
- W1988484614 created "2016-06-24" @default.
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- W1988484614 date "2014-07-01" @default.
- W1988484614 modified "2023-10-02" @default.
- W1988484614 title "Comparative investigation of dual-phase membranes containing cobalt and iron-based mixed conducting perovskite for oxygen permeation" @default.
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- W1988484614 doi "https://doi.org/10.1016/j.memsci.2014.03.047" @default.
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