Preparation and microstructure of glass-ceramics and ceramic composite materials

Abstract

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.

Keywords

CaO-Al₂O₃-SiO₂ system / glass-ceramic / ceramic body

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