Preparation and microstructure of glass-ceramics and ceramic composite materials

The technology and microstructure of glass-ceramics and ceramic composite materials were studied. A suitable ceramic body was chosen on the basis of the sintering temperature of CaO-Al₂O₃-SiO₂ system glass-ceramics. According to the expansion coefficient of the ceramic body, that of CaO-Al₂O₃-SiO₂ system glass-ceramics was adjusted. β-wollastonite was found present as the major crystalline phase in glassceramic. The CaO-Al₂O₃-SiO₂ system glass-ceramic layer and ceramic body could be sintered together by adjusting the sintering period. The compositions of glass-ceramic layer and ceramic body diffuse mutually at 1 100 °C, resulting in an interface between them. To achieve good sintered properties of glass-ceramics and the chosen ceramic body, at least a four-hour sintering time is used. Funded by the National Supporting Plan of China(No. 2006BAJ02B03)