Abstract : In this work, we have observed the crystallization process of Li2O-Al2O3-SiO2 glass using a high-temperature confocal laser scanning microscope and studied its crystallization kinetics with differential thermal analysis. The value of activation energy has been calculated out using Kissinger and Flynn–Wall–Ozawa methods. The results show that LiAlSi3O8 crystal particles precipitate at 850 oC, and then gradually grow to 75 um with the irregular hexagonal structure until 980 oC. The activation energy of two exothermal peaks through Kissinger method is 121.78 ± 13.42 and 189.74 ± 7.76 kJ/mol. Glass transition and crystallization both have remarkable kinetics effects, and kinetic crystallization parameter, Avrami index (n), indicates that crystallization mechanism of two exothermal peaks corresponds to one-dimensional and surface crystallization, respectively.

中文翻译：

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Li2O-Al2O3-SiO2玻璃结晶过程的原位观察及动力学分析

摘要：在这项工作中，我们使用高温共焦激光扫描显微镜观察了 Li2O-Al2O3-SiO2 玻璃的结晶过程，并用差热分析研究了其结晶动力学。使用 Kissinger 和 Flynn-Wall-Ozawa 方法计算了活化能的值。结果表明，LiAlSi3O8 晶体颗粒在 850 oC 时析出，然后逐渐长大到 75 um，具有不规则的六边形结构，直到 980 oC。Kissinger法得到的两个放热峰的活化能为121.78±13.42和189.74±7.76kJ/mol。玻璃化转变和结晶均具有显着的动力学效应，动力学结晶参数、Avrami 指数 (n)、