Influence of production conditions on the densification of zirconia powders obtained from acetates |
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| Authors: | M. Descemond C. Brodhag F. Thevenot B. Durand M. Roubin A. Samdi |
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| Affiliation: | (1) Ecole Nationale Supérieure des Mines de Saint Etienne, 158 Cours Fauriel, 42023 Saint Etienne Cedex 2, France;(2) Laboratoire de Chimie Minérale 3, URA CNRS no. 116, ISIDT, Université Claude Bernard Lyon I, 43 Boulevard du 11 November 1918, 69622 Villeurbanne Cedex, France;(3) Faculté des Sciences Aïn Chok, BP 5366, Maarif, Casablanca, Morocco |
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| Abstract: | ![]()
Tetragonal yttrium-stabilized zirconia samples were obtained by pyrolysis of amorphous acetates containing both metals, at 950 °C in air. The dilatometric behaviour of samples indicates a dedensification when pyrolysis is carried out with a non-linear heating rate causing an absence of fine open porosity. A destabilization when cooling is observed for samples exhibiting a wide granulometry with agglomerate sizes reaching 100  m. Even when neither one, nor the other phenomenon is noticed, an important aggregation state of the starting powders limits the densification and leads to poor sintered densities. |
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