Investigation of the Ionic Structure of Molten 1.5–8 KF-AlF3 Salts with Raman Spectroscopy
Investigation of the Ionic Structure of Molten 1.5–8 KF-AlF3 Salts with Raman Spectroscopy
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DOI：
10.1007/s11837-019-03882-1
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发表时间：
2020-01
期刊：
影响因子：
2.6
通讯作者：
Ming Lin;Xianwei Hu;Zhongning Shi;B. Gao;Jiang-yu Yu;Zhaowen Wang
中科院分区：
文献类型：
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作者：
Ming Lin;Xianwei Hu;Zhongning Shi;B. Gao;Jiang-yu Yu;Zhaowen Wang
利用拉曼光谱分析了不同摩尔比（1.5 ~ 8）的KF-AlF 3熔融体系在不同温度下阴离子的形态和浓度分布。结果表明，当摩尔比为1.5-5时，体系中存在AlF 63-、AlF 52-、AlF 4-和F-，而当摩尔比为6-8时，体系中仅存在AlF 63-、AlF 52-和F-。当摩尔比在1.5-2.5之间时，AlF 52 −离子的含量是体系中所有络合离子中对温度最敏感的，而当摩尔比在4-8之间时，观察到组成阴离子含量随温度的微小变化。在摩尔比为1.5-5、6和7或8的体系中，随着温度的升高，Al 3+离子分别倾向于形成AlF 4-、AlF 52-和AlF 63-。
The form and concentration distribution of anions in a molten KF-AlF3system with different molar ratios (1.5–8) at different temperatures were analyzed with Raman spectroscopy. The results indicate that for molar ratios in the range of 1.5–5, AlF63−, AlF52−, AlF4−, and F−, were all present in the system, while for molar ratios in the range of 6–8, only AlF63−, AlF52−, and F−, were present. For molar ratios in the range of 1.5–2.5, the AlF52−ion content was the most sensitive to temperature among all the complex ions in the system, whereas for molar ratios in the range of 4–8, minor variations in the constituent anion contents were observed as a function of temperature. The Al3+ions in the system with the molar ratios of 1.5–5, 6, and 7 or 8 tended to form AlF4−, AlF52−, and AlF63−, respectively, as the temperature increased.