STUDY OF PHASE TRANSFORMATIONS OF A SYNTHESIZED MULLITE
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Date
2018-02-05
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University of Eloued جامعة الوادي
Abstract
The use of ceramics as substrates for photovoltaic cells lends itself well to the various thin
film deposition techniques. The mullite Al2O3-2SiO2 is a very good material for this
application. It can be synthesized by different methods. The best indicated way is to enrich
kaolin with alumina. In this work we studied the different transformations of phase of kaolin
and kaolin- aluminum slag mixtures are studied. The raw materials used are local (from
Algeria).During heat treatment, the kaolin- aluminum slag mixture undergoes several
transformations of phase leading to the formation of mullite. The beginning of crystallization
of the primary mullite is at 1000 ° C .The firing of the kaolin at 1400 °C led to the formation
of the larger quantity of mullite but for the mixture led to the acceleration of the formation of
secondary mullite. At 1500 ° C, the mullitization of the mixture is almost complete
Description
Séminaire National Sur Laser Solaire Et Matériaux ElOeued 5-6 Février 2018
Keywords
kaolin (DD2), mullite, aluminum slag, phase transformations.