Phase Diagram, Short-Range Structure, and Amorphous Phases in the ZrO2-GeO2(-H2O) System |
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| Authors: | Sacha Karlin Philippe Colomban |
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| Affiliation: | Laboratoire de Dynamique, Interactions et Réactivité(LADIR), Centre National de la Recherche Scientifique (CNRS), 94320 Thiais, France, and Département Matériaux et Systémes Composites (DMSC), Office National d'Etudes et de Recherches Aérospatiales (ONERA), 92322 Chatillon, France |
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| Abstract: | Gels of the ZrO2-GeO2(-H2O) system have been prepared via the hydrolysis-polycondensation of zirconium and germanium isopropoxides. Phase relationships have been deduced from differential thermal analysis, thermogravimetric analysis, and shrinkage analysis and are discussed on the basis of X-ray diffractometry and Raman scattering studies. Emphasis has been given to understanding the short-range structure. A small glass-forming domain is observed in the temperature range of 600°−700°C for compositions of 30–40 mol% GeO2. |
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