Anomalies in the thermomechanical behavior of Ba0.5Sr0.5Co0.8Fe0.2O3−δ ceramic oxygen conductive membranes at intermediate temperatures
- 3 August 2009
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 95 (5), 051901
- https://doi.org/10.1063/1.3193657
Abstract
The thermomechanicalproperties of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 − δ (BSCF) were measured using ring-on-ring tests and depth-sensitive microindentation. The cubic BSCF material exhibits an anomaly in mechanical properties between 200 and 400 ° C . The observed anomaly is attributed to the transition of Co 3 + spin states which is experimentally confirmed by susceptibility measurements. Furthermore, slip lines were observed around the impression when indentation tests were carried out above 260 ° C .Keywords
This publication has 24 references indexed in Scilit:
- Mixed ionic–electronic conducting (MIEC) ceramic-based membranes for oxygen separationJournal of Membrane Science, 2008
- Phase stability of BSCF in low oxygen partial pressuresJournal of Solid State Chemistry, 2008
- Structural instability of cubic perovskite BaxSr1−xCo1−yFeyO3−δSolid State Ionics, 2008
- Structure and oxygen stoichiometry of SrCo0.8Fe0.2O3−δ and Ba0.5Sr0.5Co0.8Fe0.2O3−δSolid State Ionics, 2006
- Performance of functional perovskite membranes for oxygen productionJournal of Membrane Science, 2006
- Ba effect in doped Sr(Co0.8Fe0.2)O3-δ on the phase structure and oxygen permeation properties of the dense ceramic membranesSeparation and Purification Technology, 2001
- Investigation of the permeation behavior and stability of a Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxygen membraneJournal of Membrane Science, 2000
- A thermogravimetric study of the phase diagram of strontium cobalt iron oxide, SrCo0.8Fe0.2O3 − δMaterials Research Bulletin, 1996
- Influence of order-disorder transitions on oxygen permeability through selected nonstoichiometric perovskite-type oxidesSolid State Ionics, 1993
- Mixed ionic-electronic conductivity of La1−xSrxCo1−yFeyO3−δ perovskite-type oxidesMaterials Research Bulletin, 1988