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Synthesis of nanocrystalline CeO2–Y2O3 powders by a nitrate–glycine gel-combustion process

Published online by Cambridge University Press:  31 January 2011

Mario F. Bianchetti ,
Ricardo E. Juárez ,
Diego G. Lamas ,
Noemí E. Walsöe de Reca ,
Lidia Pérez  and
Edgardo Cabanillas
Mario F. Bianchetti
Affiliation:
PRINSO (Programa de Investigaciones en Sólidos), CITEFA-CONICET-UNSAM, J.B. de La Salle 4397, (1603) Villa Martelli, Pcia. de Buenos Aires, Argentina
Ricardo E. Juárez
Affiliation:
PRINSO (Programa de Investigaciones en Sólidos), CITEFA-CONICET-UNSAM, J.B. de La Salle 4397, (1603) Villa Martelli, Pcia. de Buenos Aires, Argentina
Diego G. Lamas
Affiliation:
PRINSO (Programa de Investigaciones en Sólidos), CITEFA-CONICET-UNSAM, J.B. de La Salle 4397, (1603) Villa Martelli, Pcia. de Buenos Aires, Argentina
Noemí E. Walsöe de Reca
Affiliation:
PRINSO (Programa de Investigaciones en Sólidos), CITEFA-CONICET-UNSAM, J.B. de La Salle 4397, (1603) Villa Martelli, Pcia. de Buenos Aires, Argentina
Lidia Pérez
Affiliation:
Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Gral. Paz 1499, (1650) San Martín, Pcia. de Buenos Aires, Argentina
Edgardo Cabanillas
Affiliation:
Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Gral. Paz 1499, (1650) San Martín, Pcia. de Buenos Aires, Argentina
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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.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 9 , September 2002 , pp. 2185 - 2188
Copyright
Copyright © Materials Research Society 2002

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