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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Glass-ceramics one-step crystallization accomplished by building Ca2+ and Mg2+ fast diffusion layer around diopside crystal
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Glass-ceramics one-step crystallization accomplished by building Ca2+ and Mg2+ fast diffusion layer around diopside crystal

机译：通过在透辉石晶体周围建立Ca2 +和Mg2 +快速扩散层来完成玻璃陶瓷的一步结晶

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摘要

CaO-MgO-SiO2 (CMS) glass-ceramics preparation normally needs two-step heat treatment (nucleation and crystal growth). In this work, CMS glass-ceramics are successfully produced by one-step heat treatment by building Ca2+ and Mg2+ fast diffusion layer between the residual glass and diopside crystal. High-temperature X-ray diffraction (HTXRD) shows that diopside crystals formed during the crystallization of CMS glass. At the glass layer between diopside crystal and residual glass, an enrichment of Na+ is observed by energy dispersive spectroscopy line scanning (EDSLS), which increases the Si-O-Na bonds that promote Ca2+ and Mg2+ ions diffusion. This layer eventually promotes further growth or ripening of the diopside crystals. Thus, nucleation and crystal growth of the CMS glass proceed continuously at the crystallization peak temperature (Tnc), detected by differential scanning calorimetry. Thereby, one-step crystallization of the CMS glass-ceramics becomes possible and practical. (C) 2016 Elsevier B.V. All rights reserved.
机译：CaO-MgO-SiO2（CMS）微晶玻璃的制备通常需要两步热处理（成核和晶体生长）。在这项工作中，通过在残留玻璃和透辉石晶体之间建立Ca2 +和Mg2 +快速扩散层的一步热处理，成功地生产了CMS微晶玻璃。高温X射线衍射（HTXRD）显示出透辉石晶体在CMS玻璃的结晶过程中形成。在透辉石晶体与残留玻璃之间的玻璃层上，通过能量色散谱线扫描（EDSLS）观察到Na +的富集，这增加了促进Ca2 +和Mg2 +离子扩散的Si-O-Na键。该层最终促进透辉石晶体的进一步生长或成熟。因此，CMS玻璃的成核和晶体生长在通过差示扫描量热法检测到的结晶峰值温度（Tnc）下连续进行。由此，CMS玻璃陶瓷的一步结晶成为可能且实用。 （C）2016 Elsevier B.V.保留所有权利。

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