CaO-Al_2O_3-SiO_2系玻璃分相的计算机模拟

Computer Simulation of Phase seperation for CaO Al 2O 3 SiO 2 System Glass

据结晶学、热力学与动力学理论， 利用 Ｔ Ｅ Ｍ、图象分析仪和计算机， 模拟了 Ｃａ Ｏ Ａｌ２ Ｏ３ Ｓｉ Ｏ２ 系玻璃的液滴状分相过程， 研究中， 结合相变理论与实验数据， 建立了数学逻辑复合分相模型， 模拟结果表明， 由成核生长机理控制的玻璃液滴状分相， 形成对数分布的主要条件是： 液滴相临界半径必须在某一特定范围内波动； 液滴相生长相对线速度应是５ ％ ～１０ ％ ； 而开始分相液滴相临界半径和终止分相时液滴相半径的绝对值与分布类型无关本模拟方法为控制玻璃的纳米结构。

According to the theory of crystallization chemistry, thermodynamics and kinetics, the process of droplet like phase separation of CaO Al 2O 3 SiO 2 glass was simulated by using TEM, image analyzer and computer The mathematics and logical model of phase separation was developed on the basis of phase transition theory and experiments The key factors of following logarithmic normal distribution are that critical sizes of droplet phase nuclei must change in a certain range for the droplet like phase separation controlled by the mechanism of nucleation growth; relative growth rate of droplet phase locates at 5%～10% The distribution type has no relationship to the absolute values of critical sizes when phase separation takes place, and to the droplet phase diameter when the droplet phase stops growing This simulation method leads to a new way to control nanometre structure of glass and make a noval glass materials with some special properties