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

Authors: D. S. Patil, K. Prabhakaran, C. Durgaprasad, N. M. Gokhale, A. B. Samui

Source: Advances in Applied Ceramics

Publisher: Maney Publishing

Abstract:

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 YCl₃, Ce(NO₃)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.

Document Type:

DOI: 10.1179/174367609X456002

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