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Elaboration and Characterization of Mullite Refractory Products from Moroccan Andalusite

New Journal of Glass and Ceramics 2012年第3期2卷 121-125页

作者： Mostafa Sardy Abdelhak Arib Kacem El Abbassi Redouane moussa moussa gomina EMPM-LPCMI Faculty of Science of Ain ChockCasablancaMorocco Centre for Study and Research of Mineral Phosphates CasablancaMorocco CRISMAT UMR 6508 ENSICAEN/CNRSCaenFrance

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.

关键词： Andalusite Mullite Refractory Structure Mechanical Properties

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Optimization of Contents of Three Raw Clay Materials in Formulation of a Porcelain

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Journal of Materials Science and Chemical Engineering 2022年第1期10卷 41-58页

作者： Youssouf Sawadogo Moustapha Sawadogo moussa Ouédraogo Mohamed Seynou Gisèle Lecomte-Nana Philippe Blanchart moussa gomina Lamine Zerbo Laboratory of Molecular Chemistry and Materials (LC2M) University Joseph KI-ZERBO Burkina Faso Institute of Research in Ceramic (IRCER) UMR-CNRS European Ceramic Center Limoges France Laboratory of Cristallography and Material Sciences (CRISMAT) UMR National Graduate School of Engineering of Caen (ENSICAEN) Caen France

Formulation of traditional hard porcelain generally requires 50% kaolin, 25% silica and 25% feldspar. Four porcelains formulation using the casting method, were prepared with different percentages of kaolinitic clay, sand and pegmatite referenced respectively NONG, SAB and PEG. The physico-chemical, mechanical and mineralogical characteristics were evaluated on specimens formulated and sintered at different temperatures from 1200˚C to 1300˚C. X-ray diffraction has revealed the presence of mullite and quartz as essentially crystalline phases. The specimen formulated with 55% NONG, 25% PEG and 20% SAB and sintered at 1240˚C gives better performance (water absorption: 0.17%, density: 2.42, open porosity: 0.42% and flexural strength: 53.54 MPa).

关键词： Raw Minerals Porcelain Characterization Chemical Durability and Phase Transformations

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Production of Corundum-Mullite Mixture with High Added Value from Raw Materials of Morocco

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New Journal of Glass and Ceramics 2016年第3期6卷 28-36页

作者： S. El Kalakhi A. Samdi R. moussa M. gomina EMPM-LPCMI Faculté des Sciences Ain Chock Casablanca Maroc CRISMAT UMR 6508 ENSICAEN/CNRS Caen Cedex France

In search of new mineral raw materials with industrial potential, we identified a deposit located in the southwest of Oujda (in the Northeastern Morocco). The physicochemical analyses indicate that the ore consists mainly of diaspore, topaz and quartz, and also secondary minerals. The presence of topaz in the ore is explained by hydrothermal action on the structure of diaspore. The investigation of structural transformations reveals complex reaction mechanisms that result in a mixture of corundum-mullite at 1200℃, which is of great industrial interest. Thus, the peculiarity of this ore is the presence of fluorine and secondary minerals.

关键词： Diaspore Topaze Corundum Mullite Structural Transformations

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