TITLE

Oxygen tracer diffusion in dense Ba0.5Sr0.5Co0.8Fe0.2O3-δ films

AUTHOR(S)
Wang, L.; Merkle, R.; Maier, J.; Acartürk, T.; Starke, U.
PUB. DATE
February 2009
SOURCE
Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is an interesting material for high temperature oxygen permeation membranes and solid oxide fuel cell cathodes, applications for which oxygen transport properties are crucial. Here oxygen isotope exchange is performed on dense BSCF films prepared by pulsed laser deposition on MgO single crystal substrates. The oxygen isotope profile is analyzed by secondary ion mass spectrometry to extract tracer diffusion coefficients D* and effective surface exchange constants k*. Tracer diffusion has a low activation energy of 0.5 eV. At moderate temperatures, the related oxygen vacancy diffusion coefficient DVO is significantly larger than that for (La,Sr)(Fe,Co)O3-δ perovskites.
ACCESSION #
36797938

 

Related Articles

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics