Studies on the Crystallization Dynamics of Ca-P-Si Glass-Ceramic

Ca-P-Si biologic glass-ceramic is a type of new material for dental restoration with good biologic compatibility. It also looks beautiful and has improved mechanical property. The effect of ZrO 2 on the crystallization kinetics of Ca-P-Si glass-ceramic was investigated by differential thermal analysis (DTA) and X-ray diffraction (XRD). The kinetic parameters were calculated by using the JMA equation. The results indicate that the content of ZrO 2 affects the crystallization activation energy (E) and the crystal growth index (n).E increases with the increasing of content of ZrO 2, and reaches max value when content of ZrO 2 is about 5.7%. All crystal growth indexes (n) are more than 3 that indicate for this biologic glass-ceramic system the crystallization process is body crystallization.