LI Bin ¹, WEN Lihua ²

(1.School of Life Science,Huzhou Teachers' College, 313000; 2.School of Material Science and Engineering, Jiamusi University, 154007)

Abstract: The effect of ZrO₂ content on the crystallization mechanism of CaO - SiO₂ glass es was investigated by Differential Scanning Calorimetry (DSC). Kinetic pa rameters such as the crystallization activation energy(E), the frequency factor (ν) and the crystal growth index(n) have been evaluated according to the JMA equation. In the studied glass system, the larger the ZrO₂ content, the lower the crystallization activation energy(E), while the larger the crystal growth index(n) and the frequency factor(ν). When the content of ZrO₂ was 7% in the glass, the crystallization activation energy(E) was 235.580kJ/mol, and the crystal growth index(n) was 4.70. Thes e results suggested that ZrO₂ could promote the crystallization effectively.

Keywords: CaO- SiO₂ glass, ZrO₂, crystallization activative energy(E), crystal growth index(n)