Article ID Journal Published Year Pages File Type
1695874 Applied Clay Science 2010 5 Pages PDF
Abstract

Cordierite (2MgO−2Al2O3− 5SiO2) is currently an attractive ceramic material for various applications. This study describes the production of cordierite ceramic by mixing Moroccan abundant raw materials: andalusite (source of Al2O3 and SiO2) and “Ghassoul” clay (source of MgO and SiO2). The clay consists mainly of stevensite. The mixtures (size < 40 μm) were sintered at 1150, 1250 and 1350 °C for 2 h. The phases formed and structural changes by sintering were investigated by X-ray diffraction (XRD), differential thermal analysis (DTA), thermal dilatometry and scanning electron microscopy (SEM).Cordierite and andalusite were the major phases in samples sintered at 1150 °C and 1250 °C. Small amounts of enstatite, mullite and cristobalite were also observed. At 1350 °C, only cordierite was observed. The exothermic peak of the DTA curve at about 1350 °C corresponded to the solid-state formation of cordierite.

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Physical Sciences and Engineering Earth and Planetary Sciences Geochemistry and Petrology
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