Author/Authors :
L. Dieterle، نويسنده , , D. Bach، نويسنده , , R. Schneider، نويسنده , , H. Sto¨rmer، نويسنده , ,
D. Gerthsen، نويسنده , , U. Guntow، نويسنده , , E. Ivers-Tiffe´e، نويسنده , ,
A. Weber، نويسنده , , C. Peters، نويسنده , , H. Yokokawa، نويسنده ,
Abstract :
Nanocrystalline La1-xSrxCoO3-d (LSC) thin
films with a nominal Sr content x = 0.5 were deposited on
3.5 mol% yttria-stabilized zirconia (YSZ) substrates by a
low-temperature sol–gel process followed by a rapid thermal
annealing procedure at temperatures up to 900 C. The
structural and chemical stability of the as-prepared nanocrystalline
LSC and demixing effects within the thin film or
at the LSC/YSZ interface were studied after long-time
exposure at temperatures between 700 C and 1,000 C.
The grain size and surface topography were analyzed by
scanning electron microscopy. Transmission electron
microscopy combined with selected-area electron diffraction,
energy-dispersive X-ray spectrometry, and electronspectroscopic
imaging was applied for the investigation of
the microstructure and the analysis of the local chemical
composition and element distribution on the nanoscale.
Chemical potential calculations, which were performed to
assess the decomposition of LSC/YSZ as a function of
temperature, show good agreement with the experimental
results
