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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 some glass-ceramics with pyroxene structure
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Non-isothermal crystallization kinetics of some glass-ceramics with pyroxene structure

机译：某些具有辉石结构的玻璃陶瓷的非等温结晶动力学

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摘要

The kinetics of non-isothermal crystallization of two glass-ceramics obtained from a basalt rock, namely one without nucleating agents (BsM) and the other with the addition of 10% TiO _2 and 2% ZrO _2 (BsM1) was investigated using differential thermal analysis (DTA). The pyroxene structure of the two glass-ceramics was confirmed by X-ray diffraction (XRD). The activation energy as a function of the crystallized fraction was evaluated by Kissinger-Akahira-Sunose (KAS), Starink, Tang and Vyazovkin methods. The crystallization process of the sample BsM is accompanied by a single exothermic effect while the crystallization of sample BsM1 is accompanied by two exothermic effects on the DTA curve. The activation energies for sample BsM are very close to those associated to the Peak-1 of sample BsM1, varying between 325 and 345 kJ mol ~(- 1) on the entire range of crystallized fraction, α. The activation energies associated to the Peak-2 of the sample BsM1 are about 100 kJ mol ~(- 1) higher on the entire range of α compared with the activation energies of the sample BsM and those associated to the Peak-1 of sample BsM1.
机译：利用差热法研究了两种从玄武岩获得的玻璃陶瓷的非等温结晶动力学，即一种不含成核剂（BsM），另一种不含10％TiO _2和2％ZrO _2（BsM1）。分析（DTA）。通过X射线衍射（XRD）确认了两个玻璃陶瓷的辉石结构。通过基辛格-赤平-Sunose（KAS），Starink，Tang和Vyazovkin方法评估了活化能随结晶级分的变化。样品BsM的结晶过程伴随着单个放热效应，而样品BsM1的结晶伴随着DTA曲线上的两个放热效应。样品BsM的活化能非常接近与样品BsM1的Peak-1相关的活化能，在整个结晶级分α范围内在325至345 kJ mol〜（-1）之间变化。与样品BsM1的峰值2相关的活化能和与样品BsM1的Peak-1相关的活化能在整个α范围内大约高100 kJ mol〜（-1）。 。

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