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《Glass & Enamel》 2002-01
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Studies on the Crystallization Dynamics of Ca-P-Si Glass-Ceramic

YU Bing, LIANG Kai?ming, GU Shou?ren (Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China)  
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.
【CateGory Index】: TQ171.733
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