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Reactivity of aluminum sulfate and silica in molten alkalimetal sulfates in order to prepare mullite

El Ouatib, Rachida and Guillemet-Fritsch, Sophie and Durand, Bernard and Samdi, Azzeddine and Er-Rakho, Lahcen and Moussab, Redouane Reactivity of aluminum sulfate and silica in molten alkalimetal sulfates in order to prepare mullite. (2005) Journal of the European Ceramic Society, vol. 2. pp. 73-80. ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2003.12.002

Abstract

With the aim of preparing mullite, reactions between aluminum sulfate and silica in appropriate proportions and molten sulfate media M2SO4 (M=Na and/or K) were performed at different temperatures. The powders obtained were characterized by XRD, FT-IR, SEM and TEM. The reactivity was the same in Na2SO4 and (K,Na)2SO4 media. The best results in terms of yield (98.3%) and weight of mullite produced (95%) were obtained in Na2SO4 at 950 °C. The mullite phase exhibits an acicular morphology (75×0.75 μm) and a specific surface area close to 20 m2/g. In K2SO4 medium, a potassium alumino silicate is formed as well as mullite.

Item Type:Article
Additional Information:http://www.sciencedirect.com/science/journal/09552219
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 (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
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Deposited By: Thomas Bonnecarere
Deposited On:06 May 2008 13:29

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