Na_3AlF_6-Al_2O_3系熔盐离子结构的拉曼光谱研究  

Raman Spectroscopic Study on the Structure of Na_3AlF_6-Al_2O_3 Molten Salt System

作　　者：吕秀梅[1] 尤静林[1] 王媛媛[1] 王建[1] 伍俊[1] 王敏[1] 刘晓伟[1] 

机构地区：[1]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《光散射学报》2015年第1期39-43,共5页The Journal of Light Scattering

基　　金：国家自然科学基金重点项目(50932005);国家自然科学基金(20973107;40973046);上海市科委科技基金(12520709200)资助

摘　　要：利用激光共焦拉曼光谱仪测定了不同氧化铝含量的Na3AlF6-Al2O3体系的常温与升温拉曼光谱,通过解析该拉曼光谱总结了其离子结构的种类以及随温度的变化规律,并对相应的拉曼谱峰进行了归属。结果表明当温度升至1173K及以上时,样品开始熔化并出现AlF63-→AlF4-的转化,同时伴有复杂离子的生成。将实验结果与模拟计算结合,发现在氧化铝含量较高的样品中存在络合离子Al2O2F42-。Raman spectra of the Na3AlF6-Al2O3 systems containing different alumina were measured by laser confocal Raman Spectrometer at room temperature and high temperature.Various ion clusters were assigned and identified,as well as the temperature dependent evolution of ion clusters by analyzing in-situ Raman spectra obtained.It revealed that as the temperature was heated up to 1173 K,the samples began to melt accompanied by the transformation from AlF6^3-to AlF4^-and the formation of more complicated ion clusters.With the consideration of computational data,it suggested that the complex ion Al2O2F4^2- emerge in samples with higher alumina content.

关 键 词：Na3AlF6-Al2O3 高温熔盐 拉曼光谱 络合离子 

分 类 号：TF821[冶金工程—有色金属冶金]