Glass-ceramics one-step crystallization accomplished by building Ca2+ and Mg2+ fast diffusion layer around diopside crystal
Glass-ceramics one-step crystallization accomplished by building Ca2+ and Mg2+ fast diffusion layer around diopside crystal
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透辉石晶体周围构建Ca2、Mg快速扩散层实现微晶玻璃一步晶化
DOI：
10.1016/j.jallcom.2016.07.027
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发表时间：
2016-12
影响因子：
6.2
通讯作者：
Alex A. Volinsky
中科院分区：
文献类型：
--
作者：
Jian Yang;Bo Liu;Shengen Zhang;Alex A. Volinsky
CaO单键MgO单键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）。本文采用一步热处理法，在残余玻璃与透辉石晶体之间建立Ca ~（2+）、Mg ~（2+）快速扩散层，成功制备出CMS微晶玻璃。高温X射线衍射（HTXRD）分析表明，CMS玻璃在析晶过程中形成了透辉石晶体。能量色散谱线扫描（EDSLS）结果表明，在透辉石晶体与残余玻璃之间的玻璃层中，Na+的富集增加了促进Ca ~（2+）和Mg ~（2+）离子扩散的Sisingle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的结晶峰值温度（Tnc）下连续进行。从而使CMS微晶玻璃的一步晶化成为可能和实用。
CaOsingle bondMgOsingle bondSiO2(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 Sisingle bondOsingle bondNa 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.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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