Short Range Order Evolution in the Preparation of SnO2 Based Materials |
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| Authors: | GES Brito SJL Ribeiro V Briois J Dexpert-Ghys CV Santilli SH Pulcinelli |
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| Institution: | (1) Instituto de Quimica, UNESP, CP 355, CEP 14800-900 Araraquara, SP, Brazil;(2) LURE, Bat 209D, 91405 Orsay Cedex, France;(3) Lab. PCM, Ecole Centrale Paris, 92295 Chatenay Malabry, France |
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| Abstract: | 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. |
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| Keywords: | SnO2 xerogel sintering Eu3+ spectroscopy XRD EXAFS |
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