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Hot pressing of nanocrystalline TiO2 (anatase) ceramics with controlled microstructure

Weibel, Alicia and Bouchet, Renaud and Denoyel, Renaud and Knauth, Philippe Hot pressing of nanocrystalline TiO2 (anatase) ceramics with controlled microstructure. (2007) Journal of the European Ceramic Society, vol. 27 (n° 7). pp. 2641-2646. ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2006.11.073

Abstract

The preparation conditions of nanocrystalline phase-pure TiO2 anatase ceramics by hot pressing are described. Density, surface area, pore size distribution and grain size are determined by various techniques, including gas adsorption, mercury porosimetry, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The evolution of the structural parameters is followed as function of temperature and pressure programme. It is shown that the porosity, grain and pore size of the ceramics can be controlled by a suitable choice of experimental conditions. Ceramics with densities higher than 90% of the theoretical limit with a mean grain size of 30 nm can be obtained at temperatures as low as 490 ◦C under 0.45 GPa for 2 h. The experimental results are discussed in view of the sintering theory.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of the European Ceramic Society website : http://www.sciencedirect.com/science/journal/09552219
Audience (journal):International peer-reviewed journal
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Institution:Other partners > Université de Provence - Aix-Marseille I (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Celine Cabaup
Deposited On:13 May 2009 12:07

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