共晶盐低温反复相变的晶体变化  

Crystal Changes of Eutectic Salt After Cryogenic Repeated Phase Transition

作　　者：黎涛[1] 于亮[1] 宋文吉[1] 张建军[1] 冯自平[1] 

机构地区：[1]中国科学院广州能源研究所,广州510640

出　　处：《科技导报》2013年第28期81-83,共3页Science & Technology Review

基　　金：广东省中国科学院全面战略合作重点项目(2012B091100275)

摘　　要：以氯化钠作为共晶盐研究对象,探讨共晶盐反复多次的低温液-固相变后的晶体变化趋势。通过X射线衍射仪,对试样相变前后的晶体的晶面间距、粒径等参数进行分析,判断其晶体结构的变化趋势。通过同步热分析仪、电导率仪,分析试样相变前后的潜热、电导率的变化趋势。分析结果表明,共晶盐经过反复多次的相变后,晶体粒径从微米级逐渐向纳米级转变,有向无定形非晶体转化的趋势;同时,相变温度、潜热与电导率呈下降趋势。Sodium chloride was researched as the eutectic salt, and its crystal change after cryogenic repeated liquid-solid phase transition was analyzed by using an X-ray diffractometer. The analysis results show that the crystal grain size changes from micron to nanoscale, having the trend to form amorphous. At the same time, phase-transition temperature, latent heat and conductivity were declining.

关 键 词：共晶盐 低温 相变 晶体 非晶体 

分 类 号：TQ115[化学工程—无机化工]