Investigation of Interrelation between Particle Size and Phase Transition in the Al2O3-ZrO2 System

Abstract:

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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.

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Periodical:

Pages:

35-41

DOI:

10.4028/www.scientific.net/JNanoR.6.35

Citation:

D. A. Ivanov-Pavlov et al., "Investigation of Interrelation between Particle Size and Phase Transition in the Al2O3-ZrO2 System", Journal of Nano Research, Vol. 6, pp. 35-41, 2009

Online since:

June 2009

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$35.00

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