| Identification of structural entities in NdF3-LiF melts with cryoscopic method |
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| 作者姓名： | 胡宪伟 王兆文 高炳亮 石忠宁 刘凤国 包莫日根高娃 |
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| 作者单位： | [1]School; [2]of; [3]Materials; [4]and; [5]Metallurgy,Northeastern; [6]University,Northeastern; |
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| 基金项目： | Project（51004034）supported by the National Natural Science Foundation of China; Project（N090302009）supported by the Fundamental Research Funds for the Central Universities,China |
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| 摘 要： | 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.
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| 关 键 词： | structural entities NdF3-LiF melts cryoscopic method liquidus temperature |
| 收稿时间： | 23 November 2009 |
Identification of structural entities in NdF3-LiF melts with cryoscopic method |
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| Xian-wei HU,Zhao-wen WANG,Bing-liang GAO,Zhong-ning SHI,Feng-guo LIU,Morigen-gaowa BAO.Identification of structural entities in NdF3-LiF melts with cryoscopic method[J].Transactions of Nonferrous Metals Society of China,2010,20(12):2387-2391. |
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| Authors: | Xian-wei HU Zhao-wen WANG Bing-liang GAO Zhong-ning SHI Feng-guo LIU Morigen-gaowa BAO |
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| Affiliation: | School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China |
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| Abstract: | 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. |
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| Keywords: | structural entities NdF3-LiF melts cryoscopic method liquidus temperature |
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