Effect of sintering and melt casting methods on properties of a machinable fluor-phlogopite glass–ceramic

The effects of the melt casting and the sintering methods on the machinability and other characteristics of a SiO2–Al2O3–MgO–K2O–B2O3–F glass–ceramic composition were examined. The results show that the specimen prepared by the sintering method had better machinability and mechanical properties, due to a higher mica volume percent and finer crystallite size. It was found that the specimen had undergone surface crystallization; hence, it was concluded that preparation of the specimen by the sintering route would be less sensitive to heating conditions.