| Issue |
J. Phys. III France
Volume 7, Number 3, March 1997
|
|
|---|---|---|
| Page(s) | 483 - 490 | |
| DOI | https://doi.org/10.1051/jp3:1997136 | |
J. Phys. III France 7 (1997) 483-490
Preparation and Characterization of Nanocrystalline ZrO 2-Ga 2O 3 Solid Solutions
P. Barret and P. BerthetLaboratoire de Chimie des Solides URA 446 CNRS, Bâtiment 414, Université Paris-Sud, 91405 Orsay Cedex, France
(Received 6 May 1996, revised 15 July 1996, accepted 22 October 1996)
Abstract
Nanocrystalline solid solutions of gallium oxide in zirconia were prepared by the crystallization, between 500 and 800 °C,
of amorphous coprecipitates containing up to 53 mol% gallium. The thermal evolution of the material from the amorphous state
to its decomposition was followed by DTA and TGA correlated with XRD. The solid solutions are nanocrystalline (10-25 nm),
their structure is tetragonal (Ga/Zr
) or cubic. The cell parameter of the cubic materials decreases from 5.09 to 4.97 Åwith increasing gallium content. These
solid solutions decompose near 925 °C by diffusion of the gallium ions towards the crystallite surface.
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