Stabilization of cubic perovskite structure upon trivalent cation substitution in Co-based mixed conductors (BaxSr1-x)(Co0.9Y0.1)O3-delta

作者：Nagai T^*; Ito W

来源：Solid State Ionics, 2014, 262: 650-653.

DOI：10.1016/j.ssi.2013.10.054

• Perovskite
• Hexagonal polymorph
• Phase transition
• Stability
• Oxygen permeability
• Membrane

The stabilization of perovskite through trivalent cation substitution is a promising strategy for the development of oxygen permeation membranes. In this study, perovskite stabilization through yttrium substitution in (BaxSr1-x) (Co0.9Y0.1)O3-delta was investigated and compared with that of Al. A perovskite single phase of (BaxSr1-x)(Co0.9Y0.1)O3-delta was attained at a Ba concentration of 1.0 >= x >= 0.5, which was higher than the range at which the hexagonal polymorph occurred. This differed from (BaxSr1-x)(Co0.9Al0.1)O3-delta in which the perovskite occurred at a lower Ba concentration than the hexagonal polymorph. In addition, (Ba0.9Sr0.1)(Co0.9Y0.1)O3-delta showed good oxygen permeability on a level similar to that of (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-delta.

• 出版日期2014-9-1