摘要
通过DSC曲线研究了不同含量的ZrO2对CaO-SiO2系玻璃析晶的影响,根据JMA方程计算动力学参数(如析晶活化能E、频率因子ν、晶化指数n)。从计算结果可以看出,随着ZrO2含量的增加,析晶活化能E减少,而频率因子ν和晶化指数n增加。当ZrO2含量为7%时,E值最小:235.58kJ/mol;n值最大:4.70。说明ZrO2在CaO-SiO2玻璃体系是有效的晶核剂。
The effect of ZrO2 content on the crystallization mechanism of CaO-SiO2 glasses was investigated by Differential Scanning Calorimetry （DSC）. Kinetic parameters such as the crystallization activation energy（E）,the frequency factor （v） 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（v）. 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. These results suggested that ZrO2 could promote the crystallization effectively.
出处
《陶瓷学报》
CAS
2005年第4期249-253,共5页
Journal of Ceramics
基金
黑龙江省教育厅普通高等学校骨干教师创新能力资助计划项目(编号:1054G051)
