Short Range Order Evolution in the Preparation of SnO2 Based Materials

Artículos de revistas

Fecha

1997-12-01

Registro en:

Journal of Sol-Gel Science and Technology, v. 8, n. 1-3, p. 261-268, 1997.

0928-0707

http://hdl.handle.net/11449/65241

10.1007/BF02436850

WOS:A1997WQ33400041

2-s2.0-0030678286

6446047463034654

5584298681870865

9971202585286967

0000-0003-3286-9440

0000-0002-8356-8093

Autor

Universidade Estadual Paulista (Unesp)

Bat. 209D

Lab. PCM

Institución

Universidade Estadual Paulista (Brasil)

Resumen

The evolution of Eu3+ doped SnO2 xerogels to the cassiterite structure observed during sintering was studied by means of Eu3+ spectroscopy, XRD and EXAFS at the Sn K-edge. Eu3+ ions adsorbed at the surface of colloidal particles present a broad distribution of sites, typical of oxide glasses. With sintering at 300°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 Eu3+ limits the crystallite growth.