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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Kinetics of non-isothermal crystallization of chalcogenide glasses from the Sb32As5S48I15 system
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Kinetics of non-isothermal crystallization of chalcogenide glasses from the Sb32As5S48I15 system

机译：Sb32As5S48I15体系中硫属化物玻璃的非等温结晶动力学

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The work considers the kinetics of non-isothermal crystallization, especially from the point of view of the possibility of applying the Augis–Bennett method for the determination of activation energy. The necessity of introducing the usual approximation T T0 was analyzed. It was shown that the method can be applied not only in the cases when T T0, but also when T > T0 that is, when the two temperatures differ only by about 10%. We show also that the application of the Augis–Bennett formula in such cases is more accurate the higher the value of the Avrami index n is. The method was applied to study the crystallization kinetics of the glass Sb32As5S48I15. The results obtained by differential scanning calorimetry (DSC) under non-isothermal conditions were also analyzed using the Kissinger and Matusita method. In the process of glass heating, a single peak is observed for glass transformation and a double peak for glass crystallization. The activation energies of glass transition (Eg) and crystallization (Ec) were determined, as well as the value of the Avrami index n for the second crystallization process. The obtained values for n and m indicate that the crystallization phase involves three-dimensional nucleation and growth. On the other hand, in agreement with the obtained results of the theoretical analysis, such n value justifies the application of the Augis–Bennett method for the investigated glass for which T and T0 do not differ significantly.
机译：这项工作考虑了非等温结晶的动力学，特别是从使用Augis-Bennett方法确定活化能的可能性的角度出发。分析了引入通常的近似T T0的必要性。结果表明，该方法不仅可以应用于T T0的情况，而且还可以应用于T> T0的情况，也就是说，当两个温度相差仅约10％时。我们还表明，在这种情况下，Avrami指数n的值越高，应用Augis–Bennett公式的精度越高。该方法用于研究玻璃Sb32As5S48I15的结晶动力学。还使用Kissinger和Matusita方法分析了在非等温条件下通过差示扫描量热法（DSC）获得的结果。在玻璃加热过程中，观察到一个单峰用于玻璃转化，而观察到一个双峰用于玻璃结晶。确定了玻璃化转变（Eg）和结晶化（Ec）的活化能，以及第二结晶化过程的Avrami指数n的值。获得的n和m值表明结晶相涉及三维成核和生长。另一方面，与理论分析获得的结果一致，这样的n值证明了将Augis-Bennett方法应用于T和T0差别不大的被研究玻璃的合理性。

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