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Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis

Akurati, Kranthi K. and Bhattacharya, S. S. and Winterer, M. and Hahn, H. (2006):
Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis.
In: Journal of Physics D: Applied Physics, IOP Publishing, pp. 2248-2254, 39, (10), ISSN 0022-3727, [Online-Edition: http://dx.doi.org/10.1088/0022-3727/39/10/037],
[Article]

Abstract

The chemical vapour synthesis (CVS) route is a versatile process that can be used for the synthesis of nanocrystalline ceramics with very small crystallite sizes having a narrow particle size distribution. In this study, a CVS technique was used to prepare nanocrystalline titania from tetraisopropyl orthotitanate at a processing temperature of 1273 K (1000 °C). High resolution transmission electron microscopy, x-ray diffraction and nitrogen adsorption techniques were used for the characterization of the as-synthesized powders. Green bodies were produced by a combination of uniaxial and cold isostatic pressing, which were then sintered. A simple pressureless sintering route was established that led to the production of a dense titania ceramic with a uniform microstructure and an average grain size well in the nanophase regime.

Item Type: Article
Erschienen: 2006
Creators: Akurati, Kranthi K. and Bhattacharya, S. S. and Winterer, M. and Hahn, H.
Title: Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis
Language: English
Abstract:

The chemical vapour synthesis (CVS) route is a versatile process that can be used for the synthesis of nanocrystalline ceramics with very small crystallite sizes having a narrow particle size distribution. In this study, a CVS technique was used to prepare nanocrystalline titania from tetraisopropyl orthotitanate at a processing temperature of 1273 K (1000 °C). High resolution transmission electron microscopy, x-ray diffraction and nitrogen adsorption techniques were used for the characterization of the as-synthesized powders. Green bodies were produced by a combination of uniaxial and cold isostatic pressing, which were then sintered. A simple pressureless sintering route was established that led to the production of a dense titania ceramic with a uniform microstructure and an average grain size well in the nanophase regime.

Journal or Publication Title: Journal of Physics D: Applied Physics
Volume: 39
Number: 10
Publisher: IOP Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 13 Feb 2013 09:50
Official URL: http://dx.doi.org/10.1088/0022-3727/39/10/037
Identification Number: doi:10.1088/0022-3727/39/10/037
Funders: The financial support provided by the DAAD, Germany, to AKK for the stay and research work at TUD Germany is gratefully acknowledged., The authors would like to thank the BMBF-DLR, Germany, for supporting exchange visits under an Indo–German project., One of the authors, SSB, would also like to thank the Alexander von Humboldt Foundation, Germany.
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