Synthesis of monodisperse nanocrystalline 8 mol-% yttria doped ceria powder by oleate complex route

• Published in: Advances in applied ceramics Vol. 109; no. 1; pp. 45 - 50
• Main Authors: Patil, D S, Prabhakaran, K, Durgaprasad, C, Gokhale, N M, Samui, A B
• Format: Journal Article
• Language: English
• Published: London, England Taylor & Francis 01.01.2010; SAGE Publications
• Subjects: Chemical synthesis; Nanocrystalline powder; Sintering; Yttria doped ceria; Nanocrystalline powder; Chemical synthesis; Yttria doped ceria; Sintering
• ISSN: 1743-6753; 1743-6761
• DOI: 10.1179/174367609X456002

Preparation of monodisperse nanocrystalline yttria doped ceria powder by the oleate complex route has been reported. Y(III) and Ce(III) oleate complexes have been prepared by the reaction between YCl 3 , Ce(NO 3 ) 3 and sodium oleate at the interface of hexane rich and water rich conjugate layers of water-ethanol-hexane ternary liquid system. Cubic yttria doped ceria crystallises when the waxy solid containing Y(III) oleate and Ce(III) oleate complexes was heat treated at 400°C. The powder after planetary ball milling contains monodisperse near spherical particles of 0·2 μm. These particles contain monodisperse nanocrystallites of size <10 nm. The yttria doped ceria powder pellets were sintered to >98% theoretical density at 1450°C. The sintered ceramic showed an ionic conductivity of 0·0623 S cm −1 at 800°C and activation energy of 1·0 eV.