Investigation of Interrelation between Particle Size and Phase Transition in the Al2O3-ZrO2 System
|Periodical||Journal of Nano Research (Volume 6)|
|Main Theme||Journal of Nano Research Vol. 6|
|Citation||Denis A. Ivanov-Pavlov et al., 2009, Journal of Nano Research, 6, 35|
|Online since||June, 2009|
|Authors||Denis A. Ivanov-Pavlov, Vladimir G. Konakov, Elena N. Solovieva, Viktor M. Ushakov, Natalia V. Borisova|
|Keywords||Al2O3-ZrO2, Nanoparticle, Phase Diagram|
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.