Abstract
The structure development of nanocrystalline yttria-stabilized zirconia (ZrO2–3.4 mol % Y2O3) synthesized by coprecipitation of hydroxides followed by microwave drying and calcination in the temperature range from 300 to 1000 °C was investigated. A complex series of methods was used for the structure characterization: X-ray diffraction (XRD) analysis, radial distribution function of electronic density (RDF), small-angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy (HRTEM). The wide range of the used techniques allowed us to reveal the structure formation at all hierarchic levels of organization: atomic level, where features of the local atomic arrangement were discovered; crystallite level; and the level of secondary particles (aggregates), where grain boundaries are formed and nanostructuring takes place. The nanostructure features, the grain boundaries containing a lot of defects, were found to improve the catalytic performance of zirconia in CO oxidation. The results de...
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