J. Phys. IV France
Volume 123, March 2005
Page(s) 35 - 39

J. Phys. IV France 123 (2005) 35-39

DOI: 10.1051/jp4:2005123005

Elaboration and characterization of europium doped ceria solid solutions

L. Aneflous1, S. Villain2, J.R. Gavarri2, J. Musso2, H. Benyaich1, A. Benlhachemi1 and A. Marrouche1

1  Laboratoire de Chimie de Solide, Univ. Ibn Zohr, Fac. Sc., BP. 8106, 80000 Agadir, Maroc
2  Laboratoire L2MP, Univ. Toulon-Var, BP. 132, 83957 La Garde, France

Cerium dioxides doped or substituted by europium have been prepared using low (320 $^{\circ}$C) and high temperature (1350 $^{\circ}$C) processes. The Eu substituted ceria phase obtained at high temperature is a solid solution Ce $_{1-{\rm x}}$Eu$_{\rm x}$O $_{2-\delta}\ 0\le {\rm x}\le
0.30$.The stoechiometry of the pure CeO $_{2-{\rm z}}$ ceria was controlled using an impedance spectroscopy approach permitting evaluation of sample stoechiometry (z). The various substituted samples were studied using X-ray diffraction. In initial low temperature [ 1/2 ${\rm Eu}_{2}$O3 - CeO2] systems, the ceria particles are nanosized (D = 4.3 nm). In sintered samples, a linear variation of cell parameters is clearly observed.

© EDP Sciences 2005