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XRD Microstructural Characterization of Tetragonal Pure Zirconia Powders Obtained by Controlled Hydrolysis of Zirconium Alkoxides

Published online by Cambridge University Press:  10 January 2013

P. Scardi ,
L. Lutterotti  and
R. Di Maggio
P. Scardi
Affiliation:
Dipartimento di Ingegneria dei Materiali, Università di Trento, 38050 Mesiano, Trento, Italy.
L. Lutterotti
Affiliation:
Dipartimento di Ingegneria dei Materiali, Università di Trento, 38050 Mesiano, Trento, Italy.
R. Di Maggio
Affiliation:
Dipartimento di Ingegneria dei Materiali, Università di Trento, 38050 Mesiano, Trento, Italy.
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Abstract

A new preparation procedure to obtain tetragonal pure zirconia powders is reported together with a detailed analysis of the profile of X-ray Diffraction (XRD) peaks. The crystallization kinetic up to 800°C is described through r.m.s. microstrain and crystallite size distributions. The results of two methods of profile analysis are compared. After thermal treatments up to 100°C the samples of amorphous gel prepared crystallize in the tetragonal structure. The monoclinic phase occurs only above this temperature. Moreover the tetragonal to monoclinic transformation has a strong effect in changing the shape of the distributions. Studying the crystallite size distributions we can infer a critical size of about 300 Å for the tetragonal crystallites to transform. The shape of the mean crystallite of a fully tetragonal sample is also described.

Type
Research Article
Information
Powder Diffraction , Volume 6 , Issue 1 , March 1991 , pp. 20 - 25
Copyright
Copyright © Cambridge University Press 1991

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