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Inductively Coupled Plasma Synthesis of CeO2-based Powders from Liquid Solutions for SOFC Electrolytes

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Abstract

Doped cerium oxide (CeO2) based electrolytes are attractive alternative materials to replace the existing yttria-stabilized zirconia (YSZ) used as electrolyte for SOFC (solid oxide fuel cells). Cerium oxide electrolytes offer a similar performance to YSZ electrolytes at a lower cell operating temperature (~600--800 °C), therefore reducing thermal stresses and solid state reactions among the cell components.Doped Ce1-xMexO2-x/2(Me = Gd, Sm or Y) fine \hbox{powders} were synthesized from nitrate salts dissolved in water using a radio frequency inductively coupled plasma reactor. It was demonstrated that the relative concentrations of Ce and dopants fed in the solutions were retained in the synthesized powders. The products were all nano-crystalline with the basic crystal structure of CeO2 and the crystal size of the products was essentially independent of the dopant used. The particle size distributions obtained were multimodal and in most cases trimodal. The results obtained differ from a previously reported mechanism of particle synthesis from liquid precursors.

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Authors and Affiliations

  1. Department of Chemical Engineering, Plasma Technology Research Centre (CRTP), McGill, Wong Building, 3610 University St., Montreal, Quebec, Canada, H3A 2B2

    Ian A. Castillo & Richard J. Munz

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  1. Ian A. Castillo
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  2. Richard J. Munz
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Correspondence to Richard J. Munz.

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Castillo, I.A., Munz, R.J. Inductively Coupled Plasma Synthesis of CeO2-based Powders from Liquid Solutions for SOFC Electrolytes. Plasma Chem Plasma Process 25, 87–107 (2005). https://doi.org/10.1007/s11090-004-8836-3

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  • DOI: https://doi.org/10.1007/s11090-004-8836-3

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