Aerodynamic Levitation Studies of Ceramics at Very High-Temperature: XAFS and XRD
A levitation device associated with laser heating has been developed in order to measure the structure of ceramics at very high temperature by using synchrotron radiation sources. Combined X-ray diffraction and X-ray absorption measurements have been performed on spherical solid and liquid samples i...
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Veröffentlicht in: | Japanese Journal of Applied Physics 1999-01, Vol.38 (S1), p.87 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A levitation device associated with laser heating has been developed in order to measure the structure of ceramics at very high temperature by using synchrotron radiation sources. Combined X-ray diffraction and X-ray absorption measurements have been performed on spherical solid and liquid samples in a controlled atmosphere up to 2800°C. The analysis chamber was integrated with the 7-circles goniometer of the D2AM station at the ESRF. This technique presents a novel opportunity to probe the short-range and long-range properties of high-temperature oxides up to the liquid phase. By studying the local structure around cations in oxides, we have shown that the combined XAFS and XRD data, deriving from
in-situ
synchrotron radiation experiments, contain valuable information on phase transitions, contributing to the optimisation of the fabrication of ceramics. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.7567/JJAPS.38S1.87 |