Study on preparation of slag glass-ceramics by new process

At present,the preparation techniques of slag glass-ceramics were mainly rolling technique,casting technique and sintering technique.In this paper,a new preparation process of glass-ceramics was put forward at the basis of fully absorbing the merits in casting technique and sintering technique.Taking tantalum-niobium tailings as the main raw materials,basic glass components are selected within the CaO-Al2O3-SiO2 system glass-forming region.Utilizing the testing methods of DTA,XRD and SEM,influence of thermal treatment on the crystallization process,crystalline phase composition,micro-structure were studied.The results show that the new process for glass-ceramics preparation are viable in laboratory,and variation of heat treatment process will affect the crystallization transition process of glass and microstructure of the glass-ceramic.