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Publications in Scientific Journals:

O. Metelkina, N. Hüsing, P. Pongratz, U. Schubert:
"Effects of the post-synthesis treatment on the structural properties of alumina-doped zirconia";
Journal of Non-Crystalline Solids, 285 (2001), 64 - 70.



English abstract:
Zirconia doped by 5 wt% alumina was prepared by sol-gel processing of aluminum sec-butoxide and zirconium butoxide in the presence of acetic acid and a surfactant (Pluronic P123) as organic additives. The influence of different post-synthesis treatment methods, i.e., supercritical drying with CO2, aging in the mother liquor at 100°C or solvothermal treatment in ethanol or ethanol/water, on the textural properties of the mixed-oxide gels was investigated after calcination at 500°C. Solvothermal treatment or aging at elevated temperatures resulted in crystalline primary particles with diameters in the range 2-6 nm, while only partially crystalline particles (10-15 nm) were obtained by supercritical drying. The texture of the powders and the aluminum environment were rather independent of the kind of post-synthesis treatment. Solvothermal treatment resulted in significantly higher surface areas and pore volumes.

Created from the Publication Database of the Vienna University of Technology.