Volume 9, Issue 4, December 2020, Page: 59-67
Formulation of Clay Refractory Bricks: Influence of the Nature of Chamotte and the Alumina Content in the Clay
Moustapha Sawadogo, Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Mohamed Seynou, Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Lamine Zerbo, Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Brahima Sorgho, Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Gisèle Laure Lecomte-Nana, Institute of Research for Ceramic (IRCER), European Ceramic Centre (CEC), Limoges, France
Philippe Blanchart, Institute of Research for Ceramic (IRCER), European Ceramic Centre (CEC), Limoges, France
Raguilnaba Ouédraogo, Laboratory of Molecular Chemistry and Materials (LC2M), University Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Received: Oct. 22, 2020;       Accepted: Nov. 5, 2020;       Published: Nov. 23, 2020
DOI: 10.11648/j.am.20200904.11      View  98      Downloads  80
Abstract
Refractory materials from kaolinitic clays and clay chamotte or quartz were studied to increase the refractoriness under load at temperature above 1300°C. Two different clays mined in Burkina Faso were used and chamotte grains were obtained by preliminary firing a local clay. Fired materials at 1350-1400°C present a typical granular composite microstructure where large grains of chamotte or quartz are embedded in the clay matrix phase. Under load at high temperature, the behavior of material is influenced by the nature of the clay matrix phase that progressively melt at high temperature, the type of chamotte or quartz grains, the grain sizes of different phases and the sequence of the thermal transformations during firing. Kinetics of creep under a constant load were characterized against temperature and time. It gives the typical temperatures at fixed creep strains, that’s a well-recognized method for the refractoriness quantification. It’s shown that the kinetic of creep change with the variation of viscosity with temperature of the melted clay matrix phase, that’s related to both the chemical composition and the extend of the micro-composite nature of the heat transformed clays. Results also indicated that values of activation energy for creep are correlated to the refractoriness of materials.
Keywords
Clay, Chamotte, Mullite, Refractoriness
To cite this article
Moustapha Sawadogo, Mohamed Seynou, Lamine Zerbo, Brahima Sorgho, Gisèle Laure Lecomte-Nana, Philippe Blanchart, Raguilnaba Ouédraogo, Formulation of Clay Refractory Bricks: Influence of the Nature of Chamotte and the Alumina Content in the Clay, Advances in Materials. Vol. 9, No. 4, 2020, pp. 59-67. doi: 10.11648/j.am.20200904.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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