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Effect of nano-Al2O3 addition on the densification of YSZ electrolytes

journal contribution
posted on 2009-01-01, 00:00 authored by D Hotza, A Leo, Jaka Sunarso, J Diniz da Costa
This work investigates the effect of nanosized Al2O3 addition on the sinterability of YSZ electrolyte. (1-x)YSZ + Al2O3 ceramics with compositions x = 0 to 0.01 were prepared by the conventional mixed oxide route from a commercial powder suspension (particle size <50 nm), and sintered at 1200 to 1500 degrees C for 2 hours in air. Densification, phase evolution, and microstructure were characterized by SEM/EDS and XRD. An improvement in sintered density was observed for the samples with 0.2 to 0.5 mol% Al2O3, though depending on the sintering temperature. Only cubic zirconia was detected as crystalline phase, although XRD features suggested chemical interactions depending upon the amount of Al2O3. The grain size of YSZ was homogeneous and no second phase segregation was detected in the tested range of incorporated nano-Al2O3 and sintering temperatures.

History

Journal

Journal of nano research

Volume

6

Pagination

115 - 122

Publisher

Trans Tech Publications Ltd

Location

Zürich, Switzerland

ISSN

1662-5250

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2009, Trans Tech Publications

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