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Journal of Materials Science

Erschienen in:

11.07.2019 | Metals

Application of hydrogen for rare-earth gadolinium purification and thermodynamic simulation of system

verfasst von: Jiongkun Wang, Guoling Li, Kai Fu, Xingguo Li

Erschienen in: Journal of Materials Science | Ausgabe 20/2019

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Abstract

Due to the extremely high chemical reactivity of gadolinium (Gd), especially the removal difficulty of trace impurities, preparation of ultra-high purity Gd is challenging. Herein, we introduce H₂ into Ar plasma arc, building a reductive gas flow with high-density thermal energy. H₂ + Ar plasma arc melting performs a wonderful refining effect despite of high initial concentrations. Migration ways and removal mechanism of various impurities have been systematically analyzed. Electromagnetic driving force and turbulence thermal flow of the hydrogen plasma arc are numerically simulated. Results show that activated hydrogen ions, dissociated in plasma arc and bringing special physical and chemical interactions, are supposed to be the cause for the excellent refining effect.

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Titel: Application of hydrogen for rare-earth gadolinium purification and thermodynamic simulation of system
verfasst von: Jiongkun Wang
Guoling Li
Kai Fu
Xingguo Li
Publikationsdatum: 11.07.2019
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 20/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-019-03608-3

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