Na2O-CaO-Al2O3-SiO2系統微晶玻璃的析晶動力學研究

Na2O-CaO-Al2O3-SiO2 glass-ceramics is a new kind of constructional material. It not only provides with good mechanical properties, but also possesses of good decorative effects. The kinetic parameters of this glass-ceramics were calculated by differential thermal analysis (DTA), and the crystallization kinetic of this glass-ceramics system was investigated. The results indicate that the crystallization activation energy (E) and kinetic crystallization parameter k (Tp) increase with increasing CaO content eventually. The crystalline indexes (n) are all less than 3 and indicate that for this glass-ceramic system the crystallization process is surface crystallization.