Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1413 - C7-1416
DOI http://dx.doi.org/10.1051/jp4:19937217
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1413-C7-1416

DOI: 10.1051/jp4:19937217

EXAFS study of zirconia precursors

C. LANDRON1, J.C. RIFFLET1, P. ODIER1 and D. BAZIN2

1  Centre de Recherches sur la Physique des Hautes Températures, 45071 Orléans cedex 2, France
2  Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, 91405 Orsay cedex, France


Abstract
An original process has been developed for the synthesis and the characterization of spherical zirconia powders having high densifying ability. This technique is based on the nebulization of a zirconium precursor solution followed by a suitable heat treatment. Structural characterization of the starting precursor has been achieved by an in situ EXAFS analysis of the nebulised precursor in the form of an aerosol. We have shown that high purity, chemical homogeneity, particle size and sphericity which are requested for improving the ceramic elaboration, are related to the structural characteristics during the synthesis. Improvement of the mechanical properties of the ceramic relie on a bette knowledge of the pre-sintering steps involving structural transformations of the precursor.



© EDP Sciences 1993