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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 >Non-isothermal crystallization kinetics of ZnO-BaO-B2O3-SiO2 glass
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Non-isothermal crystallization kinetics of ZnO-BaO-B2O3-SiO2 glass

机译：ZnO-BaO-B2O3-SiO2玻璃的非等温结晶动力学

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摘要

Glass of composition 40SiO(2)-30BaO-20ZnO-10B(2)O(3) (mol%) Was made by conventional melting and casting process. Crystallization kinetics of above glass has been investigated under non-isothermal conditions, using the formal theory of transformations for heterogeneous nucleation. The procedure is applied to the experimental data obtained by differential thermal analysis (DTA). using continuous-heating techniques. The crystallization results are analyzed, and both the activation energy of crystallization process as well as the crystallization mechanism is characterized. Dilatometric measurement of this glass was also done and data obtained was used to calculate the viscosity of the formed glass. Development of crystalline phases on thermal treatments of the glass at various temperatures has been analyzed by X-ray diffraction. Microstructure of the crystalline phases was investigated by scanning electron microscopy (SEM) and the development of various structural features with variation in heat treatment cycle was observed. The nucleation and growth of these phases in the matrix of glass has been described and discussed. (C) 2008 Elsevier B.V. All rights reserved.
机译：通过常规的熔融和铸造工艺制备组成为40SiO（2）-30BaO-20ZnO-10B（2）O（3）（mol％）的玻璃。使用非均相成核的形式化转化理论，已经在非等温条件下研究了上述玻璃的结晶动力学。该程序适用于通过差热分析（​​DTA）获得的实验数据。使用连续加热技术。分析了结晶结果，表征了结晶过程的活化能和结晶机理。还对该玻璃进行了对角线测量，并将获得的数据用于计算所形成的玻璃的粘度。已经通过X射线衍射分析了在各种温度下对玻璃进行热处理时结晶相的发展。通过扫描电子显微镜（SEM）研究了结晶相的微观结构，并观察到随着热处理周期的变化，各种结构特征的发展。已经描述和讨论了玻璃基质中这些相的成核和生长。 （C）2008 Elsevier B.V.保留所有权利。

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