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Yttria-Doped Zirconia as Solid Electrolyte for Fuel-Cell Applications

Butz, Benjamin

Abstract:
7.3-10 mol% yttria-doped zirconia (YDZ) was studied with emphasis on its long-term stability as solid electrolyte. The decomposition of common 8.5YDZ (950 °C) was detected by analytical TEM. As second issue, the microstructural and chemical properties of nanocrystalline 7.3YDZ thin films were investigated. Metastable t''-YDZ was found to precipitate in nanoscaled regions in YDZ up to 10 mol% yttria. Furthermore, a revised boundary of the c+t phase field, in which YDZ decomposes, is presented.

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Volltext §
DOI: 10.5445/IR/1000015724
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Laboratorium für Elektronenmikroskopie (LEM)
Publikationstyp Hochschulschrift
Jahr 2009
Sprache Englisch
Identifikator urn:nbn:de:swb:90-157244
KITopen-ID: 1000015724
Verlag Universität Karlsruhe, Karlsruhe
Abschlussart Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Laboratorium für Elektronenmikroskopie (LEM)
Prüfungsdaten 27.11.2009
Referent/Betreuer Prof. D. Gerthsen
Schlagworte yttria-stabilized zirconia, degradation of ionic conductivity, analytical
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