| Abstrak/Abstract |
In this study, glass ceramics composites made from the mixture between fly ash and glass waste powder. The glass waste powder was varied 0%, 10%, 20%, 30% and 50%. Each mixture was uniaxially pressed using stainless steel molding with a compacting pressure of 130 MPa to produce green body. The green body was then sintered using pressureless sintering method with a heating rate of 5oC/min at various temperatures of 900, 950, 1000, 1050 and 1100oC for 2 h. from the experimental result, it shows that the increase of glass waste powder contents in the composites tends to increase mechanical properties of glass ceramic product. The optimum properties of glass ceramics in this study were obtained from specimen with mixture ratio of 50% fly ash+50% glass waste with compacting pressure of 130 MPa. The macximum hardness of 2205 MPa and density of 2.04 g/cm3 is obtained in the 50FA-50GL specimen with sintering temperature of 1050oC. The presence of crystalline phases in the glass ceramic specimen is highly varied based on the composition of green body before sinter. The major crystalline phases are found in the glass ceramics specimen corresponds to quartz (SiO2), mullite syn (Al4.64Si1.36O9.68), hematite (Fe2O3), albite Ca-rich [(Na,Ca)Al(Si,AL)3O8], MAPO-20 syn ( C8H24Al4Mg2N2O24P6), and enstatite (Mg1.83Fe0.17Si2O6). |
