| Autor: |
Ivanov-Pavlov, Denis A., Konakov, Vladimir G., Solovieva, Elena N., Ushakov, Viktor M., Borisova, Natalia V. |
| Zdroj: |
Journal of Nano Research; January 2008, Vol. 1 Issue: 1 p35-41, 7p |
| Abstrakt: |
Powder precursors of the Al2O3-ZrO2 system were synthesized by the sol-gel method. Dispersity of the powders depended on synthesis and drying conditions. Differential Scanning Calorimetry, X-Ray diffraction, and method of adsorption–desorption isotherms were used to characterize the interrelations between particle size and phase transition in the Al2O3-ZrO2 system. It was revealed that azeotropic drying under overpressure is quite effective for obtaining well-dispersed powder precursors synthesized by the sol-gel method. In contrast to bulk materials, tetragonal, cubic, and monoclinic phases were found to exist in a wider temperature-composition range. It was shown that the existing phase symmetry in the well-dispersed powders correlates with the crystallite size. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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