Short Range Order Evolution in the Preparation of SnO2 Based Materials

Brito, G. E S; Ribeiro, Sidney José Lima; Briois, V.; Dexpert-Ghys, J.; Santilli, Celso Valentim; Pulcinelli, Sandra Helena

Otro

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

http://acervodigital.unesp.br/handle/11449/65241

10.1007/BF02436850

WOS:A1997WQ33400041

2-s2.0-0030678286

http://dx.doi.org/10.1007/BF02436850

http://repositorioslatinoamericanos.uchile.cl/handle/2250/886986

Autor

Brito, G. E S

Ribeiro, Sidney José Lima

Briois, V.

Dexpert-Ghys, J.

Santilli, Celso Valentim

Pulcinelli, Sandra Helena

Institución

Universidade Paulista Júlio de Mesquita Filho (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.