氯离子对Solar Salt熔盐热物性的影响及结构分析  

Influence of Cl^- on thermal stability of NaNO_3-KNO_3 mixed molten salts

作　　者：杜宝强[1,2] 王怀有[1,3] 李锦丽[1,3] 赵有璟 杨红军[1,3] 王敏[1,3] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学,北京100049 [3]中国科学院盐湖资源化学实验室,青海西宁810008

出　　处：《应用化工》2017年第6期1086-1088,1092,共4页Applied Chemical Industry

基　　金：国家自然科学基金青年项目(21601197);中国青海省自然科学基金(2014-ZJ-909);中国科学院青海盐湖研究所青年引导基金(Y560291145)

摘　　要：以质量比6∶4的NaNO_3/KNO_3的混合熔盐为基础,添加Cl^-,测定DSC-TG,研究其热稳定性并进行XRD分析。结果表明,Cl^-对NaNO_3-KNO_3熔点和相变潜热影响较小,上限温度轻微降低,热稳定性变差;XRD结果表明,在NaNO_3-KNO_3熔盐冷却时,Cl-优先与Na+结合;常温下,Cl^-以固溶体的形式存在。m This study examines the addition of Cl-on the thermal properties and structure of a mixed NaNO3/KNO3 salt with mass ratio of 6∶4.A DSC-TG test was used in the measurements under different temperatures and a X-ray diffractometer was used in the measurements under room temperature.The results suggest that melting point,latent heat capacity and upper limitation temperature change were small.When the molten salt solidifies and crystallizes,Cl-ions combine with Na＋ preferentially,and Na＋ ions exist in the form of solid solution.It was also found that Cl-ions exist in the form of solid solution at the room temperature.

关 键 词：Solar Salt熔盐 热物性 杂质离子 X射线衍射 

分 类 号：TQ131.1[化学工程—无机化工]