MgF2 katkısının Vermikülit esaslı cam-seramiklerin işlenebilirlik özellikleri üzerine etkisi

The study deals with production of the glass-ceramics from natural raw material vermiculite. The machinability properties of the glass-ceramic compositions were investigated depending on vermiculite and MgF2 contents. The compositions containing 80 %, 85 %, 90 % vermiculite, 5 % K2O and MgF2 as remainder were mixed by using a ball mill for 2 h and coded as VER80, VER85 and VER90. The mixed and milled powders were sieved and disc samples were prepared by pressing at 100 MPa. The shaped samples were sintered at 900-1100 ºC for 1 h. X-ray diffraction (XRD), scanning electron microscopy (SEM), and machinability test were conducted. The results have indicated that the samples have good sintering and machinability properties