Density and ionic structure of NdF3-LiF melts

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	Density and ionic structure of NdF3-LiF melts
其他题名	Density and ionic structure of NdF 3-LiF melts
	Hu Xianwei; Wang Zhaowen; Gao Bingliang; Shi Zhongning; Liu Fengguo; Cao Xiaozhou
	2010
发表期刊	JOURNAL OF RARE EARTHS
ISSN	1002-0721
卷号	28 期号:4 页码:587-590
摘要	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.
其他摘要	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
关键词	NdF3-LiF melts density molar volume Nd-F complex ions ionic structure rare earths
收录类别	CSCD
语种	英语
资助项目	[National Basic Research Program of China] ; [Fundamental Research Funds for the Central Universities]
CSCD记录号	CSCD:3969281
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/145329
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 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.