| Density and ionic structure of NdF3-LiF melts | |
| Alternative Title | Density and ionic structure of NdF 3-LiF melts |
| Hu Xianwei; Wang Zhaowen; Gao Bingliang; Shi Zhongning; Liu Fengguo; Cao Xiaozhou | |
| 2010 | |
| Source Publication | JOURNAL OF RARE EARTHS
 |
| ISSN | 1002-0721 |
| Volume | 28Issue:4Pages:587-590 |
| Abstract | NdF3-LiF melts are commonly used in the electrolysis process of metallic neodymium production. Research on the density and ionic structure of the electrolyte is important for its close connection with the electrolysis mechanism and process. In this paper, the density of LiF-NdF3 melts was studied by the Archimedes method. The results showed that the density decreased with increasing temperature and LiF contents. The changing law was discussed and explained in terms of the micro ionic structure of the melts. The ionic structure of 25 mol.% NdF3-75 mol.% LiF was then quantitatively analyzed on the condition that Nd(3+) existed in the forms of both NdF63 and NdF4. The results indicated that NdF63-, NdF4-, and F-took the amount of 22 mol.%-25 mol.%, 25 mol.%, and 50 mol.%-52 mol.% respectively in the anions of the melts in the temperature range of 950-1050 degrees C. In addition, NdF63- was easier to decompose at a higher temperature. |
| Other Abstract | NdF_3-LiF melts are commonly used in the electrolysis process of metallic neodymium production. Research on the density and ionic structure of the electrolyte is important for its close connection with the electrolysis mechanism and process. In this paper, the density of LiF-NdF_3 melts was studied by the Archimedes method. The results showed that the density decreased with increasing temperature and LiF contents. The changing law was discussed and explained in terms of the micro ionic structure of the melts. The ionic structure of 25 mol.% NdF_3-75 mol.%LiF was then quantitatively analyzed on the condition that Nd~(3+) existed in the forms of both NdF_6~(3-) and NdF_4~-. The results indicated that NdF_6~(3-), NdF_4~-, and F took the amount of 22 mol.%-25 mol.%, 25 mol.%, and 50 mol.%-52 mol.% respectively in the anions of the melts in the temperature range of 950-1050 ℃. In addition, NdF_6~(3-) was easier to decompose at a higher temperature |
| Keyword | NdF3-LiF melts density molar volume Nd-F complex ions ionic structure rare earths |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Basic Research Program of China] ; [Fundamental Research Funds for the Central Universities] |
| CSCD ID | CSCD:3969281 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/145329 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Hu Xianwei,Wang Zhaowen,Gao Bingliang,et al. Density and ionic structure of NdF3-LiF melts[J]. JOURNAL OF RARE EARTHS,2010,28(4):587-590. |
| APA | Hu Xianwei,Wang Zhaowen,Gao Bingliang,Shi Zhongning,Liu Fengguo,&Cao Xiaozhou.(2010).Density and ionic structure of NdF3-LiF melts.JOURNAL OF RARE EARTHS,28(4),587-590. |
| MLA | Hu Xianwei,et al."Density and ionic structure of NdF3-LiF melts".JOURNAL OF RARE EARTHS 28.4(2010):587-590. |
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