Distribution model of lowly volatile impurity in rare earth metal purified by vacuum distillation

Zhang, Lei; Zhang, Xiaowei; Li, Zongan; Chen, Dehong; Wang, Zhiqiang; Pang, Shuxin; Zhou, Lin; Wu, Denghao; Ke, Ling-sheng; Nan, ChangBin

doi:10.1016/j.seppur.2021.118314

Cited by 11 publications

(2 citation statements)

References 28 publications

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“…Because the electronic structures of La and Si are complex and their chemical properties are very active, the factors affected by impurities are serious. The purity of rare-Earth metal has a serious impact on electrical properties of contacts and electroluminescence properties [15][16][17][18][19]. In fact, some impurities in LaSi have a serious impact, while some impurities will not affect the performance of downstream products of LaSi.…”

Section: Introductionmentioning

confidence: 99%

The effect of impurity kinds and content on phase constituent and the microstructure of LaSi alloy

Wang

Chen²,

Zhong³

et al. 2023

Mater. Res. Express

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LaSi alloy with 1:1 atomic ratio was prepared by vacuum arc melting process, and different content impurities of Fe, Ni and Cu were added into the LaSi alloy. The phase constituent and microstructure of LaSi alloy with different impurities were studied using XRD and SEM, respectively. Experimental results showed that the LaSi alloy exhibited a new phase LaSi2-x when the added Fe content reached more than 300ppm. And the main diffraction peak of LaSi phase was shifted to a lower angle with the increase of Fe content. Similar to the effect of Fe impurities, the phase LaSi2-x appeared when the Ni impurity was added into LaSi alloy, while the diffraction intensity of main peak reduced by about 5 times compared to high-pure LaSi alloy. There was no LaSi2-x phase when the Cu was added into LaSi alloy, and the diffraction intensity of the main peak of LaSi increased by 2 times compared to the high-purity LaSi alloy. The microstructure of LaSi with Fe and Ni impurities displayed dark grey network. The LaSi alloy exhibited almost single-phase microstructure when the Cu impurity content reached 1526ppm. The Fe and Ni impurities exerted an obvious effect on phase and microstructure of LaSi alloy, while the Cu impurities played little effect on the phase and microstructure of LaSi alloy.

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Section: Introductionmentioning

confidence: 99%

The effect of impurity kinds and content on phase constituent and the microstructure of LaSi alloy

Wang

Chen²,

Zhong³

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…High-purity, rare-earth metals are the material basis for high-performance rare-earth permanent magnets, PV materials, catalysis materials, and their application devices, which have received great interest in both academic and new energy vehicles, integrated circuit, storage chip, 5G, and OLED fields [1]. Therefore, lanthanum has become an increasingly important metal used in modern technology, such as the robot industry and the instrument industry.…”

Section: Introductionmentioning

confidence: 99%

Research of High-Purity Lanthanum Prepared by Zone Refining

Pan

Wang

et al. 2022

Materials

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In this paper, the purification of lanthanum was studied by using zone-refining technology. The equilibrium distribution coefficient of impurities was calculated using a liquidus slope method to reveal impurities’ distribution properties. Meanwhile, the analysis of impurities’ concentration distribution for Fe and Si has been investigated based on the SPIM model. The calculated findings based on SPIM were found to be in good agreement with the experimental results. In addition, the influence of the zone-refining rate and the number of passes on the purification of lanthanum were studied. It was found that after ten times of zone refining with a zone-refining rate of 5 mm/min, the contents of Fe and Si impurities in metal decreased to 4 and 2 ppm, respectively.

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Medium-volatile impurity distribution in purification of terbium metal by vacuum distillation

Zhang

et al. 2021

Separation and Purification Technology

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Distribution model of lowly volatile impurity in rare earth metal purified by vacuum distillation

Cited by 11 publications

References 28 publications

The effect of impurity kinds and content on phase constituent and the microstructure of LaSi alloy

The effect of impurity kinds and content on phase constituent and the microstructure of LaSi alloy

Research of High-Purity Lanthanum Prepared by Zone Refining

Medium-volatile impurity distribution in purification of terbium metal by vacuum distillation

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