Please use this identifier to cite or link to this item:
|Title:||Modification of B-site doping of perovskite LaxSr1 - xFe1 - y-zCoyCrzO3 - δ oxide by Mg2+ ion|
|Authors:||Gong, Z. |
Mixed ionic-electronic conductors
|Citation:||Gong, Z., Yin, X., Hong, L. (2009-11-12). Modification of B-site doping of perovskite LaxSr1 - xFe1 - y-zCoyCrzO3 - δ oxide by Mg2+ ion. Solid State Ionics 180 (28-31) : 1471-1477. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ssi.2009.09.009|
|Abstract:||Co-doping B-site of perovskite oxide LaxSr1 - xCoyFe1 - yO3 - δ (LSCFO) with Cr6+ and Mg2+ ions has been attempted in this research for revamping chemical stability and oxygen ionic conductivity of this mixed conducting oxide. It is known that partial substitution for B-site cations of LSCFO by Cr gives rise to a significant improvement on chemical and thermal stability of the perovskite oxide. On the basis of this doped structure, introduction of an immaterial dose of Mg2+ ion into its B-site results in a microstructure consisting of smaller grains with higher density than its precursor. Furthermore, the resulting perovskite oxide La0.19Sr0.8Fe0.69Co0.1Cr0.2 Mg0.01O3 - δ (LSFCCMO) displays higher O2- conductivity than the solely Cr-doped LSCFO besides the improved chemical stability against reduction in 5% CH4/He stream at 850 °C. A detailed examination of the oxidation states of B-site transition metal ions by XPS has also been conducted as a part of structural characterizations of LSFCCMO. The assessment of relative O2- conductivity shows that the grain boundary area plays a more important role than the bulk phase in facilitating ion transport, but with comparable boundary areas the higher densification level is favorable. © 2009 Elsevier B.V. All rights reserved.|
|Source Title:||Solid State Ionics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 19, 2018
WEB OF SCIENCETM
checked on Sep 4, 2018
checked on Aug 10, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.