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prF_(3)-ndF_(3)-dyF_(3)-LiF electrolyte system for preparation of pr-nd-dy alloy by electrolysis

Journal of Rare Earths 2022年第6期40卷 996-1001,I0006页

作者： Zhengping Zuo Yubao Liu Xin Yang Fengqin Liu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

The application of pr-nd-dy alloy in the field of high-performance nd-Fe-B permanent magnet materials has great *** composition of the prF_(3)-ndF_(3)-dyF_(3)-LiF(Pnd-LiF) electrolyte system used in the production of pr-nd-dy alloys,the distribution of F,Li,RE and other elements in the electrolyte and their occurrence state were studied in this *** effect of temperature and lithium fluoride addition on electrolyte conductivity was revealed using the continuous conductivity cell constant(CVCC) *** thermal analysis method was used to study the influence of lithium fluoride addition on the electrolyte’s liquidus temperature and the optimal process conditions for the production of pr-nd-dy alloy were *** results show that the overall distribution of praseodymium neodymium fluoride and lithium fluoride is uniform in the electrolyte and dysprosium fluoride is distributed between praseodymium-neodymium fluoride and lithium ***-neodymium oxide is embedded in praseodymium neodymium fluoride in spotty *** electrolyte’s conductivity is increased as the temperature and lithium fluoride addition are going up,while the liquidus temperature is going down with increasing lithium fluoride *** best electrolysis process conditions for the Pnd-LiF system to produce praseodymium neodymium dysprosium alloy are as follows:temperature1050℃ and 15.56 wt% prF_(3)-62.22 wt% ndF_(3)-11.11 wt% dyF_(3)-11.11 wt% LiF.

关键词： pr-nd-dy alloy Rare-earth electrolytic process Liquidus temperature Electrolyte conductivity

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