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    STUDIA PHYSICA - Issue no. 1 / 2009  
         
  Article:   SPECIFIC SURFACE AREA OF HEAT TREATED ILLITIC MINERAL CLAY.

Authors:  A. VULPOI, C. IONESCU, VIORICA SIMON. 		 
       
         
  Abstract:  Pristine clay samples were characterized by X-ray diffraction, differential thermal analysis and gravimetric thermal analysis, as well as by nitrogen adsorption/desorption method for specific surface area determination. The samples were thermally treated at different temperatures, up to 1200oC, and for different periods of time, up to 8 hours, in order to investigate the effect of heat treatment parameters on their porosity. The heat treatment applied for 2 hours at 1200oC leads after cooling to dark brown blackish colour, glassy structure and negligible specific surface area.

Keywords: Illite mineral clay, specific surface area, heat treatment effects. 		 
         
     
         
         
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