Grain size reduction in fully dense nanocrystalline yttria-stabilized zirconia by Al doping

In this work it was shown that the crystallite size of fully dense nanocrystalline yttria‐stabilized zirconia (ZrO2·Y2O3) can be reduced substantially by alumina doping. This could improve the oxygen transport properties and give rise to many technical applications, such as in solid oxide fuel cells...

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Veröffentlicht in:	Physica status solidi. A, Applications and materials science Applications and materials science, 2006-06, Vol.203 (8), p.R64-R65
Hauptverfasser:	Madubuonu, Anthony, Drings, Harald, Roewer, Ralf, Schaefer, Hans-Eckhardt
Format:	Artikel
Sprache:	eng
Schlagworte:	61.46.Hk 61.72.Ww 66.30.Pa 81.07.Bc 82.80.Ms Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Physics
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Beschreibung
Zusammenfassung:	In this work it was shown that the crystallite size of fully dense nanocrystalline yttria‐stabilized zirconia (ZrO2·Y2O3) can be reduced substantially by alumina doping. This could improve the oxygen transport properties and give rise to many technical applications, such as in solid oxide fuel cells. It has been recently shown that the oxygen diffusivity in the grain boundaries of nanocrystalline ZrO2·Y2O3 is strongly enhanced compared to the volume diffusivity. The present experiments show that the diffusion constant in alumina‐doped n‐ZrO2·Y2O3 is reduced compared to that of undoped n‐ZrO2·Y2O3. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	1862-6300 0031-8965 1862-6319
DOI:	10.1002/pssa.200621524