提出一种简便高效的测定熔盐电导率的新方法——管式电导池法.该方法采用热解氮化硼管自制电导池,以钨丝作为工作电极,石墨作为对电极,采用阻抗仪测定n Na F·Al F3-Al2O3-Ca F2熔盐的电阻,并与Wang经验公式和Choudhary经验公式计...提出一种简便高效的测定熔盐电导率的新方法——管式电导池法.该方法采用热解氮化硼管自制电导池,以钨丝作为工作电极,石墨作为对电极,采用阻抗仪测定n Na F·Al F3-Al2O3-Ca F2熔盐的电阻,并与Wang经验公式和Choudhary经验公式计算所得电导率数据进行比较.结果表明,自制的管式电导池法所测得数据与经验公式计算得数据相近,并且有较好的准确性和重现性.管式电导池法是一种准确度高、结构简单、造价便宜、能扩大应用范围测定熔盐电导率的有效测试手段.展开更多
Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculation...Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculations,NdF4- was identified as the most likely Nd-F entity in the melts in which the mole fraction of NdF3 was lower than 20%,considering only one single Nd species in the melt,and which was formed in accordance with Temkin model or Flood model.Then,activities of different components in the melts were researched.The results show that activity of LiF decreases,and that of NdF3 increases with increasing the mole fraction of NdF3.The value of activity coefficient of NdF3 is higher than 1,and that of LiF is lower than 1.展开更多
基金Project (2007CB210305) supported by the National Basic Research Program of ChinaProject (51074045) supported by the National Natural Science Foundation of China
文摘提出一种简便高效的测定熔盐电导率的新方法——管式电导池法.该方法采用热解氮化硼管自制电导池,以钨丝作为工作电极,石墨作为对电极,采用阻抗仪测定n Na F·Al F3-Al2O3-Ca F2熔盐的电阻,并与Wang经验公式和Choudhary经验公式计算所得电导率数据进行比较.结果表明,自制的管式电导池法所测得数据与经验公式计算得数据相近,并且有较好的准确性和重现性.管式电导池法是一种准确度高、结构简单、造价便宜、能扩大应用范围测定熔盐电导率的有效测试手段.
基金Project(51004034)supported by the National Natural Science Foundation of ChinaProject(N090302009)supported by the Fundamental Research Funds for the Central Universities,China
文摘Nd-F species in NdF3-LiF melts were studied using cryoscopic method.Liquidus temperatures of melts of various compositions were determined by differential thermal analysis(DTA).Based on the different model calculations,NdF4- was identified as the most likely Nd-F entity in the melts in which the mole fraction of NdF3 was lower than 20%,considering only one single Nd species in the melt,and which was formed in accordance with Temkin model or Flood model.Then,activities of different components in the melts were researched.The results show that activity of LiF decreases,and that of NdF3 increases with increasing the mole fraction of NdF3.The value of activity coefficient of NdF3 is higher than 1,and that of LiF is lower than 1.