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Elaboration and Characterization of Mullite Refractory Products from Moroccan Andalusite
EMPM-LPCMI, Faculty of Science of A?n Chock, Casablanca, Morocco
EMPM-LPCMI, Faculty of Science of A?n Chock, Casablanca, Morocco
Centre for Study and Research of Mineral Phosphates, Casablanca, Morocco
CRISMAT, UMR 6508 ENSICAEN/CNRS, Caen, France.
- 1 EMPM-LPCMI, Faculty of Science of A?n Chock, Casablanca, Morocco
- 2 EMPM-LPCMI, Faculty of Science of A?n Chock, Casablanca, Morocco
- 3 Centre for Study and Research of Mineral Phosphates, Casablanca, Morocco
- 4 CRISMAT, UMR 6508 ENSICAEN/CNRS, Caen, France.
New Journal of Glass and Ceramics·Volume 02 (2012)·Pages 121–125·Published 12 July 2012·DOI10.4236/njgc.2012.23017
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Abstract
Enrichment of schist mined in Morocco resulted in an extract essentially made of andalusite, quartz and muscovite, which was investigated with the aim to synthesize mullite refractory materials. X-ray diffraction analysis was used to assess phase transformations upon heating at different temperatures. Mullite formation starts as early as 1200℃ and seems almost total at 1450℃. This process correlates with a weak shrinkage (3.5% at 1450℃) and the formation of an important glass phase. Green compacts obtained by unidirectional pressing the extract powder were heated under air in the temperature range 1200℃ - 1600℃. Chemical and mechanical properties of these materials were investigated and correlated with their microstructure.
KeywordsAndalusiteMullite RefractoryStructureMechanical Properties
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