Characterization of Sc₂O₃&CeO₂-stabilized ZrO₂ powders via co-precipitation or hydrothermal synthesis.
As the presence of Sc₂O₃ and CeO₂ is known to largely enhance the ionic conductivity in the temperature range of 600-800°C, compared with the conventional yttria-stabilized ZrO₂, Sc₂O₃&CeO₂-stabilized ZrO₂ provide its applicability as electrolytes in solid oxide fuel cells. The current study introduces the methodology to synthesize Sc₂O₃&CeO₂-stabilized ZrO₂ powders by using co-precipitation technique or high-temperature hydrothermal reaction, and further describes the structural characterization of the zirconia powders synthesized by the above-mentioned two methods. The co-precipitation technique was found to allow obtaining powders of cubic phase, whereas high-temperature hydrothermal synthesis results in the presence of a monoclinic phase as well. The scanning transmission electron microscope observations also confirm that the size of the synthesized ZrO₂ powders in this study is found to be much smaller than that of commercially available powders.
Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland. j.grzonka@inmat.pw.edu.pl
Justyna
J
Grzonka
Victor
V
Vereshchak
Oleksiy
O
Shevchenko
Oleksandr
O
Vasylyev
Krzysztof J
KJ
Kurzydłowski