Ges. Brito et al., SHORT-RANGE ORDER EVOLUTION IN THE PREPARATION OF SNO2 BASED MATERIALS, JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 8(1-3), 1997, pp. 261-268
The evolution of EU(3+) doped SnO2 xerogels to the cassiterite structu
re observed during sintering was studied by means of EU(3+) spectrosco
py, XRD and EXAFS at the Sn K-edge. EU(3+) ions adsorbed at the surfac
e of colloidal particles present a broad distribution of sites, typica
l of oxide glasses. With sintering at 300 degrees C, this distribution
is still broadened. Crystallization is clearly observed by the three
techniques with increasing sintering temperature. It is found that the
addition of EU(3+) limits the crystallite growth.