The Microstructural Study of Cullet-Clay Ceramics

A series of ceramic based on (x) cullet-(100-x) clay has successfully been made by slip casting followed by sintering at 900 °C with 40≤ x ≤80 wt%. The content of the ceramic has been measured by EDX (Energy Dispersive X-ray) analysis while the phase occurrence has been determined by XRD (X-ray Diffraction) technique. It is found that the ceramic contains largely of Si, Na and Al while the phase is dominated by the occurrence of Al2SiO5 (Kyanite) and SiO2 as a minor phase. The microstructural morphology can be described by the well distributed of kyanite agglomerate with SiO2 dispersed in the matrix. The area density of their agglomeration is very much dependence on the cullet content, where the higher the cullet, the lower the area density.