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Synthesis of Yttria Stabilized Zirconia by sol–gel route: Influence of experimental parameters and large scale production

Viazzi, Céline and Deboni, Alberto and Zoppas Ferreira, J and Bonino, Jean-Pierre and Ansart, Florence Synthesis of Yttria Stabilized Zirconia by sol–gel route: Influence of experimental parameters and large scale production. (2006) Solid State Sciences, vol. 8 (n° 9). pp. 1023-1028. ISSN 1293-2558

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Official URL: http://dx.doi.org/10.1016/j.solidstatesciences.2006.02.053

Abstract

This paper develops an advance in the field of new synthesis techniques for functional materials like Yttria Stabilized Zirconia (YSZ) used as sensors, thermal barriers or electrolytes for high-temperature fuel cells. In recent years, sol–gel routes were developed to prepare, by suitable chemical modifications, submicronic based materials with a controlled morphology, which conventional solid state chemistry paths are unable to provide. Wet chemistry methods provide interesting alternative routes because mixing of species occurs on the atomic scale. In this paper, ultrafine powders were prepared by a novel wet chemistry method based on the sol–gel process. One of the advantages of this method is to decrease the crystallization temperature in comparison to the conventional ones, allowing the synthesis of reactive powders with nanometric particles size. In this study, several processing parameters have been investigated (the hydrolysis ratio, the concentration of metallic precursors in the sol and the role of organic compounds and additives). Pure phases of YSZ were obtained and the characteristics of these powders investigated (crystallographic study, morphology, phase composition, etc.). Also, our optimised synthesis was applied to large scale elaboration by increasing the quantity of precursors. This study underlines the interest of the sol–gel process both to control the morphology of oxides and to prepare large amounts of high purity powders for an eventual industrialization process.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Solid State Sciences website : http://www.sciencedirect.com/science/journal/12932558
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Universidade Federal do Rio Grande do Sul - UFRGS (BRAZIL)
Laboratory name:
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Deposited By: Celine Cabaup

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