Research of High-Purity Lanthanum Prepared by Zone Refining

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 distribu...

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Detalles Bibliográficos
Autores principales: Yu, Chuang, Pan, Bo, Wang, Zhiqiang, Chen, Dehong, Zhang, Xiaowei, Yang, Wensheng, Zhang, Dongwei, Lu, Wenli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267424/
https://www.ncbi.nlm.nih.gov/pubmed/35806727
http://dx.doi.org/10.3390/ma15134603
Descripción
Sumario: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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