Ouahdi, N. and Guillemet, S. and Demai, J.J. and Durand, B. and Rakho, L. Er and Moussa, R. and Samdi, A. (2005) Investigation of the reactivity of AlCl3 and CoCl2 toward molten alkali-metal nitrates in order to synthesize CoAl2O4. Materials Letters, 59 (2-3). 334 - 340.
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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.
|Uncontrolled Keywords:||Electron microscopy|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
Material Science > Nanochemistry
|Deposited On:||27 Jan 2009 09:55|
|Last Modified:||09 Feb 2009 15:28|
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