A generalized method for determining the crystal nucleation and growth rates in glasses by differential thermal analysis
A generalized method for determining the crystal nucleation and growth rates in glasses by differential thermal analysis
复制标题
通过差热分析测定玻璃中晶体成核和生长速率的通用方法
DOI：
10.1023/a:1013769624501
复制
发表时间：
2002
影响因子：
4.5
通讯作者：
D. Day
中科院分区：
文献类型：
--
作者：
K. S. Ranasinghe;C. Ray;D. Day
发展了一种用差热分析(DTA)测定玻璃成核速率(I)、晶体生长速率(U)和猝灭晶核浓度(NQ)的通用实验方法。这种方法甚至适用于玻璃，其I和U曲线(作为温度的函数)在相当程度上重叠。如果选择的晶体生长温度在I和U的重叠区内，用传统方法测量I可能会产生高估的I值。当应用于已知I和U曲线有相当大重叠的Na2O·2CaO·3SiO_2玻璃时，本DTA方法得到的I、U和NQ的值与用传统方法测得的值非常一致。
A generalized experimental method that uses differential thermal analysis (DTA) has been developed for determining the nucleation rate (I), the crystal growth rate (U), and the concentration of quenched-in nuclei (Nq) in glasses. The method is applicable even for glasses, whose I and U curves (as a function of temperature) overlap to a considerable degree. Measuring I by the conventional method may yield an overestimated value for I if the chosen crystal growth temperature is within the region of overlap between I and U. When applied to a Na2O · 2CaO · 3SiO2 glass, whose I and U curves are known to overlap considerably, the present DTA method yields values for I, U, and Nq that are in excellent agreement with the same values determined by the conventional methods.