Publication Date:
2017-03-16
Description:
A series of dense oxygen permeable dual-phase membranes with a composition of 60 wt% Ce 0.8 Gd 0.2 O 2−δ -40 wt% Ba 0.95 La 0.05 Fe 0.9 M 0.10 O 3−δ (CGO- BLFM 0.10 , M=Fe, Nb, Zr, Zn, Sc, Y) were successfully synthesized and evaluated as potential ceramic membranes for oxy-fuel combustion. The effects of B-site doped elements in electronic-conducting phase (BLFM 0.10 ) on the crystal structure, microstructure, chemical compatibility, oxygen permeability, as well as chemical stability of CGO-BLFM 0.10 were systematically investigated. All electronic-conducting phase BLFM 0.10 oxides exhibited a pure cubic perovskite structure and showed good chemical compatibility with ionic-conducting phase CGO. CGO-BLFSc 0.10 showed the best oxygen permeation stability under a pure CO 2 atmosphere. CO 2 -corrosion on the perovskite phase is the main reason for the property deterioration of fluorite-perovskite-typed dual-phase membrane materials. The stability of dual-phase membrane materials can be effectively enhanced by reducing the basicity of electronic-conducting phase of perovskite materials.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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