Systematic investigation on new SrCo1-yNbyO 3-δ ceramic membranes with high oxygen semi-permeability
Article
Article Title | Systematic investigation on new SrCo1-yNbyO 3-δ ceramic membranes with high oxygen semi-permeability |
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ERA Journal ID | 1677 |
Article Category | Article |
Authors | Zhang, Kun (Author), Ran, Ran (Author), Ge, Lei (Author), Shao, Zongping (Author), Jin, Wanqin (Author) and Xu, Nanping (Author) |
Journal Title | Journal of Membrane Science |
Journal Citation | 323 (2), pp. 436-443 |
Number of Pages | 7 |
Year | 2008 |
Place of Publication | Netherlands |
ISSN | 0376-7388 |
1873-3123 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.memsci.2008.07.002 |
Abstract | SrCo1-yNbyO3-δ (y = 0.025-0.4) were synthesized for oxygen separation application. The crystal structure, phase stability, oxygen nonstoichiometry, electrical conductivity, and oxygen permeability of the oxides were systematically investigated. Cubic perovskite, with enhanced phase stability at higher Nb concentration, was obtained at y = 0.025-0.2. However, the further increase in niobium concentration led to the formation of impurity phase. The niobium doping concentration also had a significant effect on electrical conductivity and oxygen permeability of the membranes. SrCo0.9Nb0.1O3-δ exhibited the highest electrical conductivity and oxygen permeability among the others. It reached a permeation flux of ∼2.80 × 10-6 mol cm -2 s-1 at 900°C for a 1.0-mm membrane under an air/helium oxygen gradient. The further investigation demonstrated the oxygen permeation processwas mainly rate-limited by the oxygen bulk diffusion process. © 2008 Elsevier B.V. All rights reserved. |
Keywords | ceramic membrane; mixed conductor; oxygen permeation; perovskite; SrCoO3-δ; bulk diffusions; cubic perovskites; electrical conductivities; mixed conductor; niobium doping; oxygen gradients; oxygen nonstoichiometry; oxygen permeabilities; oxygen permeation; oxygen permeations; oxygen separations; permeation fluxes |
ANZSRC Field of Research 2020 | 340399. Macromolecular and materials chemistry not elsewhere classified |
Byline Affiliations | Nanjing University of Technology, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3z79/systematic-investigation-on-new-srco1-ynbyo-3-ceramic-membranes-with-high-oxygen-semi-permeability
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