Phase Development in Sol-Gel Derived Lead Titanate : A XAS Study
| Autor: | G. Gnappi, Gianni Antonioli, S. Bassi, Danilo Bersani, Ivano Manzini, Pier Paolo Lottici, Angelo Montenero |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
X-ray absorption spectroscopy
Materials science Extended X-ray absorption fine structure Pyrochlore Analytical chemistry General Physics and Astronomy Mineralogy 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity XANES 0104 chemical sciences chemistry.chemical_compound chemistry 13. Climate action [PHYS.HIST]Physics [physics]/Physics archives engineering Lead titanate 0210 nano-technology Perovskite (structure) Sol-gel |
| Zdroj: | Journal de Physique IV Proceedings Journal de Physique IV Proceedings, EDP Sciences, 1997, 7 (C2), pp.C2-1161-C2-1162. ⟨10.1051/jp4:19972173⟩ Scopus-Elsevier |
| ISSN: | 1155-4339 1764-7177 |
| DOI: | 10.1051/jp4:19972173 |
| Popis: | PbTiO 3 powders have been 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 L III -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 observed 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. |
| Databáze: | OpenAIRE |
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