PHYSICOCHEMICAL and mineralogical CHARACTERIZATION

OF MOROCCAN CLAY (SAFI BROWN CLAY)

AND ITS USE IN CERAMIC TECHNOLOGY

 

A. Er-ramly*, A. Ider

Laboratoire de procédés et de l'exploitation des ressources naturelles, l'Environnement et les matériaux, Département de Chimie

Appliquée et Environnement. L'équipe de développement, la structure et les propriétés des matériaux,

Faculté des Sciences et Techniques de Settat BP 577, Université Hassan 1er Maroc

* Corresponding author: E-mail: a.erramly@yahoo.fr/a.erramly@gmail.com

Received: 17 October 2011; revised version accepted: 24 November 2011

 


Abstract

    This study concerns the results of Physicochemical and mineralogical characterization of a brown clay located in Safi region and its use in the ceramics industry. Several techniques were used; in particular X-ray diffraction (XRD), scanning electron microscopy coupled with EDX microanalysis (SEM-EDX), differential thermal and gravimetric analyses (DTA-TGA) and finally infrared Fourier transform (FTIR) and X-ray fluorescence (XRF).

     The first objective of this work is to put a new line of research that deals with the use of clay in ceramic technology. The second objective was to develop gels of oxides of high purity from these clays.

we can say that the brown clay of Safi has the same characteristics of clays used in the ceramics industry (medium heat loss, low shrinkage, good flexural strength and good behavior in plasticity),


this brown clay Safi adding 0.59% sodium carbonate is sufficient to have a good deflocculation and the viscosity is minimum corresponds to the stability of the slip, in his introduction to a formula of slip was successful with a rate of 35 to 45%.

     The SEM-EDX, X-ray, chemical analysis and Infrared spectroscopy demonstrated and allowed us to identify the different minerals that make up the brown clay, compared with the available data, we identified illite and kaolinite as clay minerals, other minerals present as impurities major are quartz, calcite, dolomite and feldspar. These results show the important features to justify its use in the ceramic industry.


Keywords : Clay; Ceramic; DTA; FX ; XRD; FTIR.

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