Iron-stabilized nanocrystalline ZrO2 solid solutions: Synthesis by combustion and thermal stability
| Autor: | Eddy De Grave, Christophe Laurent, Valdirene Gonzaga De Resende, Antoine Barnabé, Felipe Legorreta Garcia, Alain Peigney |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Universiteit Gent - UGENT (BELGIUM) |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Mössbauer spectroscopy Matériaux Mechanical Engineering Mineralogy Oxides Hematite Condensed Matter Physics Nanocrystalline material X-ray diffraction Chemical engineering Mechanics of Materials visual_art Phase (matter) visual_art.visual_art_medium General Materials Science Cubic zirconia Thermal stability Chemical synthesis Solubility Solid solution Monoclinic crystal system |
| Zdroj: | Materials Research Bulletin. 44:1301-1311 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2008.12.014 |
| Popis: | The synthesis of Fe 3+ -stabilized zirconia by the nitrate/urea combustion route was investigated. Using several characterization techniques, including X-ray diffraction, field-emission-gun scanning electron microscopy and notably Mossbauer spectroscopy, it was possible to determine the appropriate amount of urea that allows to obtain a totally stabilized Zr 0.9 Fe 0.1 O 1.95 solid solution. The nanocrystalline zirconia solid solution is mostly tetragonal, but the presence of the cubic phase could not be ruled out. An in-depth study of the thermal stability in air showed that the Fe 3+ solubility in the stabilized solid solution starts to decrease at about 875 °C which results in the formation of hematite (possibly containing some Zr 4+ ) at the surface of the zirconia grains and further provokes the progressive transformation into the monoclinic zirconia phase. |
| Databáze: | OpenAIRE |
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