Structural and chemical properties of nanocrystalline La0.5Sr0.5CoO3-δ layers on yttria-stabilized zirconia analyzed by transmission electron microscopy

被引：52

作者：

Dieterle, L. ^{[1
,2
]}

Bach, D. ^{[1
,2
]}

Schneider, R. ^{[1
,2
]}

Stoermer, H. ^{[1
,2
]}

Gerthsen, D. ^{[1
,2
]}

Guntow, U. ^{[3
]}

Ivers-Tiffee, E. ^{[4
]}

Weber, A. ^{[4
]}

Peters, C. ^{[4
]}

Yokokawa, H. ^{[5
]}

机构：

[1] Univ Karlsruhe, Lab Elektornenmikroskopie, D-76128 Karlsruhe, Germany

[2] Univ Karlsruhe, DFG Ctr Funct Nanostructures, D-76128 Karlsruhe, Germany

[3] Fraunhofer Inst Silicaforch, D-97082 Wurzburg, Germany

[4] Univ Karlsruhe, Inst Werkstoffe Elekt & CFN, D-76128 Karlsruhe, Germany

[5] Energy Technol Res Inst, Natl Inst Adv Ind Sci & Technol AIST, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 09期

关键词：

D O I：

10.1007/s10853-008-2502-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline La1-x Sr-x CoO3-delta (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 degrees 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 degrees C and 1,000 degrees 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 electron-spectroscopic 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.

引用

页码：3135 / 3143

页数：9

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