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High-energy ball milling of Al2O3–TiO2 powders

Coste, S. and Bertrand, G. and Coddet, C. and Gaffet, E. and Hahn, H. and Sieger, H. (2007):
High-energy ball milling of Al2O3–TiO2 powders.
In: Journal of Alloys and Compounds, 434-43 (434-435), Elsevier Science Publishing Company, pp. 489-492, ISSN 09258388,
[Online-Edition: http://dx.doi.org/10.1016/j.jallcom.2006.08.117],
[Article]

Abstract

High-energy ball milling of Al2O3–13 wt% TiO2 and Al2O3–44 wt% TiO2 powders have been studied and more precisely the effect of the addition of a milling agent and the relative speed of the vials. The evolution of the microstructure of the milled powders has been studied by X-ray diffraction and the evolution of the specific surface areas has been determined. The pressure and the temperature inside the vials have been recorded. The milling of the powders induces the transformation of the anatase TiO2 phase into the high-pressure TiO2(II) phase and partly into the rutile TiO2 phase. A decrease in the corundum crystallite size is also evidenced. The addition of PVA as a milling agent in order to avoid severe agglomeration appears to be efficient to enhance the milling effect. The formation of the TiO2(II) phase can be controlled thanks to the vials speed and the milling time in order to obtain quite exclusively this high pressure TiO2 phase that could be interesting to manufacture nanostructured deposits.

Item Type: Article
Erschienen: 2007
Creators: Coste, S. and Bertrand, G. and Coddet, C. and Gaffet, E. and Hahn, H. and Sieger, H.
Title: High-energy ball milling of Al2O3–TiO2 powders
Language: English
Abstract:

High-energy ball milling of Al2O3–13 wt% TiO2 and Al2O3–44 wt% TiO2 powders have been studied and more precisely the effect of the addition of a milling agent and the relative speed of the vials. The evolution of the microstructure of the milled powders has been studied by X-ray diffraction and the evolution of the specific surface areas has been determined. The pressure and the temperature inside the vials have been recorded. The milling of the powders induces the transformation of the anatase TiO2 phase into the high-pressure TiO2(II) phase and partly into the rutile TiO2 phase. A decrease in the corundum crystallite size is also evidenced. The addition of PVA as a milling agent in order to avoid severe agglomeration appears to be efficient to enhance the milling effect. The formation of the TiO2(II) phase can be controlled thanks to the vials speed and the milling time in order to obtain quite exclusively this high pressure TiO2 phase that could be interesting to manufacture nanostructured deposits.

Journal or Publication Title: Journal of Alloys and Compounds
Volume: 434-43
Number: 434-435
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Nanostructures, High-energy ball milling, X-ray diffraction
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 11:45
Official URL: http://dx.doi.org/10.1016/j.jallcom.2006.08.117
Additional Information:

Proceedings of the 12th International Symposium on Metastable and Nano-Materials (ISMANAM-2005)

Proceedings of the 12th International Symposium on Metastable and Nanomaterials (ISMANAM-2005)

Identification Number: doi:10.1016/j.jallcom.2006.08.117
Funders: This project is supported by the European STREP Program NAMAMET, 2004–2007 “processing of nanostructured material through metastable transformations”—contract no. NMP3-CT-2004-001470., We would like to emphasize acknowledgement to the Fritsch society for their kind help in providing the GTM device.
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