Optimization Of Sintered Glass Ceramics From A Waste Glass

Glass ceramic is materials made up of crystalline phases embedded in a glass matrix obtained by controlled crystallisation. Since glass ceramics contain crystalline phases, they also contain grain boundaries to change from transparent to opaque. This study focused on glass ceramic by using different ratios of soda lime silica waste glass with kaolin. The effect of adding different amount of kaolin into the soda lime silica composition has revealed the impact positive in the production of glass ceramic. The properties of glass ceramic sample after being sinter at 700 °C and 800 °C was identified according to their physical and structural. The glass ceramic sample properties were investigated using XRD, XRF, FTIR, density test and firing shrinkage. The structure investigated using XRD has indicated the crystalline phase that has a high peak for an increasing amount of kaolin when sintered at 800 °C. The density of the samples shows increasing values by the increasing amount of kaolin and decreasing amount of soda lime silica. Results obtained shows strong evidence that proved the addition of kaolin and reduction of soda lime silica give a significant effect on the physical and structural properties of glass ceramic.
Keywords: Soda lime silica, kaolin, X-Ray diffraction, density, firing shrinkage.