Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite oxide probed by electrical conductivity relaxation

Share/Save/Bookmark

Yakovlev, S. and Yoo, Chung-Yul and Fang, Shumin and Bouwmeester, H.J.M. (2010) Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite oxide probed by electrical conductivity relaxation. Applied Physics Letters, 96 (25). p. 254101. ISSN 0003-6951

[img]PDF
Restricted to UT campus only
: Request a copy
189Kb
Abstract:Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at which temperature the cubic polymorph is stable, electrical conductivity relaxation experiments are conducted during long-term annealing at 1073 K. The decreases in the surface exchange and chemical diffusion coefficients with time due to the sluggish phase transition are found to be correlated. It is demonstrated that B-site doping with Zr to an amount as low as 3 mol % stabilizes the high-temperature perovskite cubic phase of Ba0.5Sr0.5Co0.8Fe0.2O3−δ, with preservation of its high oxygen transport and exchange properties.
Item Type:Article
Copyright:© 2010 American Institute of Physics
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/76526
Official URL:http://dx.doi.org/10.1063/1.3455908
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 266949