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Influence of spectator ions on the reactivity of divalent metal salts in molten alkali metal nitrates: Morphology of the resulting metal oxides |
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| Authors: | P. Marote C. Matei J.P. Deloume |
| Affiliation: | a UMR Sciences Analytiques 5180, Université Claude Bernard Lyon 1, CPE Bat 308, 43 Bd du 11 novembre 1918, 69122 Villeurbanne Cedex, France b Department of Inorganic Chemistry, Politehnica University of Bucharest, 1 Polizu Street, 78126 Bucharest Romania, P.O. Box 12-205, France c Laboratoire des Multimatériaux et Interfaces, UMR 5615, Université Claude Bernard Lyon 1, France d LACE, UMR 5634, Université Claude Bernard Lyon 1, France |
| Abstract: | This work focuses on the investigation of the reaction of alkali metal nitrates (LiNO3, NaNO3 and KNO3) with divalent metal salts (Cu2+, Ni2+ and Zn2+). Thermogravimetric analysis (TGA) was employed to study the kinetics and mechanisms of the above reactions, which led to the formation of the corresponding metal oxides. The reaction temperature was found to depend not only on the alkali metal but also on the metal salt (MCl2 or M(NO3)2) involved in the reaction.SEM observations show that the spectator ions present in the reacting medium have varying degrees of influence on the morphology of the powder; the growth directions, sizes and the homogeneity of their distribution, are modified. KNO3 generates the most significant differences compared to LiNO3 and NaNO3. |
| Keywords: | A. Oxides B. Crystal growth C. Thermogravimetric analysis (TGA) C. Electron microscopy |
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