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Thermal Behaviour of a TiO2—ZrO2 Microcomposite Prepared by Chemical Coating

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Abstract

A microcomposite powder in the system TiO2—ZrO2 as a precursor of zirconium titanate (ZT) materials has been studied by thermal methods (DTA-TG) and X-ray diffraction (XRD). The microcomposite powder has been prepared by chemical processing of crystalline TiO2 (rutile, 10 mass% anatase),as inner core, coated with in situ precipitated amorphous hydrated zirconia gel, asouter core. The morphology and chemical composition of the resultant powders has been examined by SEM-EDX (Scanning electron microscopy-energy dispersive X-ray spectroscopy). Thermal behaviour of the microcomposite powder was reported, showing the dehydration and dehydroxylation of the zirconia gel, the crystallization into metastable cubic/tetragonal zirconia at temperatures 400—470°C, and the feasibility of preparing ZT powder materials by progressive reaction of TiO2 and ZrO2 at higher temperatures (1400°C).

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Authors and Affiliations

  1. Instituto de Ciencia de Materiales de Sevilla (ICMSE), Centro Mixto Consejo Superior de Investigaciones Científicas (C.S.I.C.), Universidad de Sevilla, c/Américo Vespucio s/n, Isla de la Cartuja, 41092, Sevilla, Spain

    G. Colón, M. A. Avilés, J. A. Navío & P. J. Sánchez-Soto

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  1. G. Colón
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  2. M. A. Avilés
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  3. J. A. Navío
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  4. P. J. Sánchez-Soto
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Correspondence to G. Colón.

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Colón, G., Avilés, M.A., Navío, J.A. et al. Thermal Behaviour of a TiO2—ZrO2 Microcomposite Prepared by Chemical Coating. Journal of Thermal Analysis and Calorimetry 67, 229–238 (2002). https://doi.org/10.1023/A:1013718804608

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