Growth of diopside crystals in CMAS glass‐ceramics using Cr2O3 as a nucleating agent
Growth of diopside crystals in CMAS glass‐ceramics using Cr2O3 as a nucleating agent
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DOI：
10.1111/jace.15700
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发表时间：
2018-09
影响因子：
3.9
通讯作者：
Yu Shi;Bao-wei Li;Ming-Yue Zhao;Mingxing Zhang
中科院分区：
文献类型：
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作者：
Yu Shi;Bao-wei Li;Ming-Yue Zhao;Mingxing Zhang
采用体析晶法制备了CaO-AlO-MgO-SiO(CaMS)系微晶玻璃。在微晶玻璃中加入CrO不仅有效地降低了微晶玻璃的晶化温度，而且在900℃晶化处理2小时后，透辉石在微晶玻璃中的析晶明显细化。实验证明，在制备微晶玻璃时，晶核处理过程中形成的透辉石在尖晶石颗粒上的外延生长，促进了透辉石在尖晶石上的异相成核，细化了透辉石。此外，实验还观察到外延生长的透辉石和尖晶石之间存在两种能量有利的晶体取向关系。它们是[1-12]尖晶石//[001]，//(11-1)尖晶石//(200)和[1-12]尖晶石]//[101]，(311)//(131-)透辉石。这两个新的结果可能被用于开发性能更好的新型微晶玻璃材料。
CaO-AlO-MgO-SiO (CAMS)-based glass-ceramics were prepared using body crystallization method. Adding CrO into the ceramics not only effectively lowered the crystallization temperature, but also led to significant grain refinement of diopside that crystallized in the CAMS glass-ceramic after crystallization treatment at 900°C for 2 hours. Experimental work verified that the epitaxial growth of the diopside on the spinel particles, which formed during nucleation treatment when fabricating the glass-ceramics, facilitated the heterogeneous nucleation of diopside on the spinel and refined the diopside. In addition, two energetically favored crystallographic orientation relationships between the epitaxial growth diopside and spinel were experimentally observed. They are [1-12]spinel//[001],//(11-1)spinel//(200) and [1-12]spinel]//[101], (311)//(131-)diopside. These two novel results can be potentially used to develop new glass-ceramic materials with improved performance.