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Investigation of the reactivity of AlCl3 and CoCl2 toward molten alkali-metal nitrates in order to synthesize CoAl2O4

Ouahdi, Noura and Guillemet-Fritsch, Sophie and Demai, Jean-Jacques and Durand, Bernard and Er Rakho, Lahcen and Moussab, Redouane and Samdi, Azzeddine Investigation of the reactivity of AlCl3 and CoCl2 toward molten alkali-metal nitrates in order to synthesize CoAl2O4. (2005) Materials Letters, vol. 5 (n° 2-3). pp. 334-340. ISSN 0167-577X

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Official URL: http://dx.doi.org/10.1016/j.matlet.2004.10.013

Abstract

Cobalt aluminate CoAl2O4 powder, constituted of nano-sized crystallites, is prepared, involving the reactivity of AlCl3 and CoCl2 with molten alkali-metal nitrates. The reaction at 450 °C for 2 h leads to a mixture of spinel oxide Co3O4 and amorphous γ-Al2O3. It is transformed into the spinel oxide CoAl2O4 by heating at 1000 °C. The powders are mainly characterized by XRD, FTIR, ICP, electron microscopy and diffraction, X-EDS and diffuse reflection. Their properties are compared to those of powders obtained by solid state reactions of a mechanical mixture of chlorides or oxides submitted to the same thermal treatment.

Item Type:Article
Additional Information:http://www.sciencedirect.com/science/journal/0167577X
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Université Hassan II Casablanca - UH2C (MOROCCO)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Thomas Bonnecarere
Deposited On:07 May 2008 06:27

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