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Effect of SiO2 and TiO2 on the Crystal Morphology of CaF2?Al2O3?CaO-Based Electroslag Remelting Slag
Steel Research International ( IF 1.9 ) Pub Date : 2021-07-07 , DOI: 10.1002/srin.202100191 Rong-huan Xu 1, 2 , Jing Guo 1, 2 , Man-cang Zhang 1, 2 , Han-jie Guo 1, 2
Steel Research International ( IF 1.9 ) Pub Date : 2021-07-07 , DOI: 10.1002/srin.202100191 Rong-huan Xu 1, 2 , Jing Guo 1, 2 , Man-cang Zhang 1, 2 , Han-jie Guo 1, 2
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The effect of SiO2 and TiO2 on the crystal morphology of 60%CaF220%Al2O320%CaO-type electroslag remelting (ESR) slags are investigated by thermodynamic simulations, differential scanning calorimetry, X-ray diffraction, scanning electron microscope, and energy dispersive X-ray spectroscopy. The results suggest that the addition of TiO2 and SiO2 changes the type, amount, and sequence of crystal precipitation. CaF2 is confirmed to be the main crystalline phase in the slag, the morphology of which depends on the slag composition and cooling rate: As SiO2 content increases, the crystal morphology of CaF2 in the slag changes from dendrites with smooth surface and relatively large secondary dendrite arm spacing to dendrites with sharp tips and relatively small secondary and tertiary dendritic arm spacings. A classical crystallographic model, Jackson α factor, is proved to correctly predict the crystal morphology as observed in the experiments. It is inferred that the addition of 5 wt% TiO2 and 4 wt% SiO2 and a proper cooling rate are favorable to improve the lubrication property of 60%CaF220%Al2O320%CaO-type ESR slags.
中文翻译：
SiO2和TiO2对CaF2?Al2O3?CaO基电渣重熔渣晶体形貌的影响
通过热力学模拟、差示扫描量热法、X射线衍射研究了SiO 2和TiO 2对60%CaF 2 20%Al 2 O 3 20%CaO型电渣重熔（ESR）渣晶体形貌的影响。 ，扫描电子显微镜和能量色散X射线光谱。结果表明，TiO 2和SiO 2的添加改变了晶体析出的类型、数量和顺序。CaF 2被证实是渣中的主要结晶相，其形态取决于渣成分和冷却速度： As SiO 2随着含量的增加，渣中CaF 2的晶体形貌由表面光滑、二级枝晶臂间距较大的枝晶转变为尖端尖锐、二级和三级枝晶臂间距较小的枝晶。经典晶体学模型 Jackson α因子被证明可以正确预测实验中观察到的晶体形态。推测添加5 wt% TiO 2和4 wt% SiO 2以及适当的冷却速度有利于改善60%CaF 2 20%Al 2 O 3 20%CaO型ESR渣的润滑性能。 .
更新日期：2021-07-07
中文翻译：
SiO2和TiO2对CaF2?Al2O3?CaO基电渣重熔渣晶体形貌的影响
通过热力学模拟、差示扫描量热法、X射线衍射研究了SiO 2和TiO 2对60%CaF 2 20%Al 2 O 3 20%CaO型电渣重熔（ESR）渣晶体形貌的影响。 ，扫描电子显微镜和能量色散X射线光谱。结果表明，TiO 2和SiO 2的添加改变了晶体析出的类型、数量和顺序。CaF 2被证实是渣中的主要结晶相，其形态取决于渣成分和冷却速度： As SiO 2随着含量的增加，渣中CaF 2的晶体形貌由表面光滑、二级枝晶臂间距较大的枝晶转变为尖端尖锐、二级和三级枝晶臂间距较小的枝晶。经典晶体学模型 Jackson α因子被证明可以正确预测实验中观察到的晶体形态。推测添加5 wt% TiO 2和4 wt% SiO 2以及适当的冷却速度有利于改善60%CaF 2 20%Al 2 O 3 20%CaO型ESR渣的润滑性能。 .
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