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Structural and Morphological Investigation of Ce0.6Zr0.4O2Oxides Synthesized by Sol-Gel Method: Influence of Calcination and Redox Treatments
- Source :
- Journal of Sol-Gel Science and Technology; January 2003, Vol. 26 Issue: 1-3 p235-240, 6p
- Publication Year :
- 2003
-
Abstract
- Ceria-zirconia mixed oxides of nominal composition Ce0.6Zr0.4O2were prepared by sol-gel method. The structural and morphological modifications of these materials due to calcination and redox treatments up to 1000°C were studied by X-ray diffraction (XRD) and Rietveld refinements, specific surface area measurements (BET), oxygen storage capacity (OSC), TEM and SEM analyses. The materials maintain high OSC after several hours of treatments at 1000°C in oxidizing and reducing atmosphere, showing good resistance to the thermal ageing. An improvement of the OSC is manifested after repetitive redox cycles, even though textural characterization shows that reduction/oxidation processes induce sintering of the crystallites.
Details
- Language :
- English
- ISSN :
- 09280707 and 15734846
- Volume :
- 26
- Issue :
- 1-3
- Database :
- Supplemental Index
- Journal :
- Journal of Sol-Gel Science and Technology
- Publication Type :
- Periodical
- Accession number :
- ejs37434099
- Full Text :
- https://doi.org/10.1023/A:1020703216503