Journalartikel

Jahr der Veröffentlichung: 2008

Seiten: 4623-4635

Zeitschrift: Physical Chemistry Chemical Physics

Bandnummer: 10

Heftnummer: 31

ISSN: 1463-9076

eISSN: 1463-9084

DOI Link: https://doi.org/10.1039/b801675e

Verlag: Royal Society of Chemistry

Abstract: 
The oxygen ion conductivity of YSZ (ZrO(2) + 9.5 mol% Y(2)O(3))/Y(2)O(3) multilayer systems is measured parallel to the interfaces as a function of temperature between 350 and 700 degrees C. The multilayer samples are prepared by pulsed laser deposition (PLD). The film thicknesses, the crystallinity, the texture and the microstructure are investigated by SEM, XRD, HRTEM and SAED. To separate the interface contribution of the total conductivity from the bulk contribution the thickness of the YSZ and Y(2)O(3) layers is varied systematically. The total conductivity of the YSZ films increases when their thickness is decreased from 0.53 mm to 24 nm. It depends linearly on the reciprocal thickness of the individual layers, thus on the number of YSZ/Y(2)O(3) interfaces. This behaviour results from the parallel connection between individual conduction paths in the bulk and the interfacial regions. The activation energy for the ionic conductivity decreases from 1.13 to 0.99 kJ mol(-1) by decreasing the thicknesses of the individual YSZ layers. HRTEM studies show that the YSZ/Y(2)O(3) interfaces are semicoherent. The correlation between interface structure and ionic conduction is discussed.

Harvard-Zitierstil: Korte, C., Peters, A., Janek, J., Hesse, D. and Zakharov, N. (2008) Ionic conductivity and activation energy for oxygen ion transport in superlattices - the semicoherent multilayer system YSZ (ZrO(2)+9.5 mol% Y(2)O(3))/Y(2)O(3), Physical Chemistry Chemical Physics, 10(31), pp. 4623-4635. https://doi.org/10.1039/b801675e

APA-Zitierstil: Korte, C., Peters, A., Janek, J., Hesse, D., & Zakharov, N. (2008). Ionic conductivity and activation energy for oxygen ion transport in superlattices - the semicoherent multilayer system YSZ (ZrO(2)+9.5 mol% Y(2)O(3))/Y(2)O(3). Physical Chemistry Chemical Physics. 10(31), 4623-4635. https://doi.org/10.1039/b801675e