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E. Kamseu, C. Leonelli, D. N. Boccaccini, P. Veronesi, P. Miselli, G. Pellacani and U. ChinjeMelo, “Characterization of Porcelain Compositions Using Two China Clays from Cameroon,” Ceramics International, Vol. 33, No. 5, 2007, pp. 851-857. doi:10.1016/j.ceramint.2006.01.025

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• TITLE: Effect of Carbon Graphite on the Crystallization of Andalusite: Application to the Synthesis of Mullite and the Improvement of Refractory Quality

  AUTHORS: Chaouki Sadik, Iz-Eddine El Amrani, Abderrahman Albizane

  KEYWORDS: Refractory; Alumina-Silica; Andalusite; Mullite; Morocco

  JOURNAL NAME: Materials Sciences and Applications, Vol.4 No.6, May 30, 2013

  ABSTRACT: Different mixtures of Moroccan silica-alumina geomaterials were used for the preparation of refractory ceramics. A formula of composition (M2) has allowed obtaining a good quality of refractory. Addition of a small quantity of carbon (1%) to the M2 formula has substantially improved the quality of the refractory. The morphological, textural and mineralogical evolution, through SEM and XRD shows that the addition of carbon, which plays a catalytic role, favors the crystallization of andalusite. Then, from 1200°C, the andalusite starts to transform to primary mullite needles. At 1400°C, the mullite becomes the major mineral phase beside cristobalite and vitreous phase.