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Non-conventional syntheses of β-alumina powders

Abstract : Because of its high ionic conductivity β-alumina is currently used as a solid electrolyte for gas sensors. In order to control the morphological propertes and sodium contents of powder used in such applications, it has been produced by two types of synthesis: by thermal denitrification and by the use of a gel. The various β-alumina crystallization mechanisms have been characterized. They illustrate the role played by certain precursors which, when present, are capable of affecting the ratio of β and β'' phases. Electrical conductivity measurements by AC technique at 300-500°C were carried out. Agering confirmed the much higher stability of the gel-prepared products.
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Submitted on : Wednesday, November 25, 2009 - 11:01:55 AM
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  • HAL Id : emse-00435876, version 1


G. Colucci, Alfredo Negro, Eliette Visconte, Christophe Pijolat, René Lalauze. Non-conventional syntheses of β-alumina powders. Ceramics International, Elsevier, 1990, pp.225-229. ⟨emse-00435876⟩



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