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

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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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

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
Uncontrolled Keywords:Electron microscopy
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
Material Science > Nanochemistry
ID Code:4190
Deposited By:SPI
Deposited On:09 Feb 2009 15:25
Last Modified:19 Feb 2009 17:22

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