Paper Title:

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
Pages 35-41
DOI 10.4028/www.scientific.net/JNanoR.6.35
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
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Abstract

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.