Abstract
In this work, the synthesis of CeO2–10 mol% Y2O3 powders by a nitrate–glycine gel-combustion route was investigated. Special attention was given to the influence of the glycine/metal ratio and calcination temperature on powder morphology. In contrast to the usual reported behavior, the best powder properties (crystallite size, 4.5–7 nm; specific surface area; 25–40 m2/g) were obtained for slow combustion processes with glycine/metal ratios of 1.5–2, whereas energetic reactions resulted in large crystallite and particle sizes. Furthermore, it was found that the crystallite size increases considerably even at moderate calcination temperatures (350–550 °C), showing the high reactivity of these nanopowders.
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Bianchetti, M.F., Juárez, R.E., Lamas, D.G. et al. Synthesis of nanocrystalline CeO2–Y2O3 powders by a nitrate–glycine gel-combustion process. Journal of Materials Research 17, 2185–2188 (2002). https://doi.org/10.1557/JMR.2002.0320
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DOI: https://doi.org/10.1557/JMR.2002.0320