| Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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|---|---|---|
| Page(s) | C2-1161 - C2-1162 | |
| DOI | https://doi.org/10.1051/jp4:19972173 | |
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
J. Phys. IV France 7 (1997) C2-1161-C2-1162
DOI: 10.1051/jp4:19972173
1 Istituto Nazionale per la Fisica della Materia and Physics Department, University, Viale delle Scienze, 43100 Parma, Italy
2 Chemistry Department and CORIVE, University, Viale delle Scienze, 43100 Parma, Italy
© EDP Sciences 1997
J. Phys. IV France 7 (1997) C2-1161-C2-1162
DOI: 10.1051/jp4:19972173
Phase Development in Sol-Gel Derived Lead Titanate : A XAS Study
G. Antonioli1, D. Bersani1, P.P. Lottici1, I. Manzini1, S. Bassi1, G. Gnappi2 and A. Montenero21 Istituto Nazionale per la Fisica della Materia and Physics Department, University, Viale delle Scienze, 43100 Parma, Italy
2 Chemistry Department and CORIVE, University, Viale delle Scienze, 43100 Parma, Italy
Abstract
PbTiO3 powders have heen obtained by the sol-gel method using different precursors and catalysts. The whole
gelation and crystallisation process was studied by means of XAS spectroscopy at the Ti K-edge and at the Pb Lm-edge. The
XANES spectra on the Ti K-edge indicate a marked change of the local environment at 500°C. The local structure around the
Ti atoms determined by EXAFS is similar to that ohserved in the pyrochlore phase for annealing temperatures below 500°C .
At this temperature both Ti and Pb environments show the occurrence of the Pb-O-Ti bonds indicating the onset of the
transformation to the perovskite phase.
© EDP Sciences 1997