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https://open.uns.ac.rs/handle/123456789/24647
Title: | Alumina doped zirconia nanopowders: Wet-chemical synthesis and structural analysis by Rietveld refinement | Authors: | Srdić, Vladimir Rakić, Srđan Cvejić, Željka |
Issue Date: | 2-Oct-2008 | Publisher: | Elsevier | Journal: | Materials Research Bulletin | Abstract: | Alumina/zirconia nanopowders, with up to 20 mol% Al2O3, were prepared by wet-chemical synthesis technique, using controlled hydrolysis of alkoxides. The as-synthesized powders are amorphous, have very high specific surface area and the corresponding particle size smaller than 4 nm. Amorphous powders with 0, 10 and 20 mol% Al2O3 crystallize at 460, 692 and 749 °C, respectively, as a single-phase tetragonal zirconia, without any traces of alumina phases. Rietvled refinement of X-ray diffraction data, used for the detailed structural analysis of annealed nanopowders, showed that the high-temperature zirconia phase is stabilized due to the formation of ZrO2/Al2O3 solid solutions. High solubility of alumina in the tetragonal zirconia (up to 28.6 at% Al3+) and stabilization of tetragonal zirconia solid solution up to high temperature (as high as 1150 °C) were also confirmed. | URI: | https://open.uns.ac.rs/handle/123456789/24647 | ISSN: | 00255408 | DOI: | (BISIS)25537 |
Appears in Collections: | PMF Publikacije/Publications TF Publikacije/Publications |
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