Preparation of stoichiometric uranium dioxide (UO2.000) via electro-reduction method in LiCl molten salt

A slight variation in O/U ratio usually exists in uranium dioxide, due to spontaneous oxidation in air. The conventional method to fabricate uranium dioxide by reducing triuranium octoxide in H 2 atmosphere shows disadvantages in low safety and unstable quality in O/U ratio. In this paper, an effect...

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Veröffentlicht in:	Journal of radioanalytical and nuclear chemistry 2022-04, Vol.331 (4), p.1601-1608
Hauptverfasser:	Du, Yunfeng, Tang, Hao, Shao, Lang, Gao, Rui, Ren, Yiming, Qin, Zhen, Jiang, Jiaolai, Liao, Junsheng
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Chemistry and Materials Science Diagnostic Radiology Hadrons Heavy Ions Inorganic Chemistry Methods Molten salts Nuclear Chemistry Nuclear energy Nuclear industry Nuclear Physics Oxidation Physical Chemistry Powders Raman spectra Raw materials Stoichiometry Uranium Uranium dioxide Uranium ores Uranium oxides
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Zusammenfassung:	A slight variation in O/U ratio usually exists in uranium dioxide, due to spontaneous oxidation in air. The conventional method to fabricate uranium dioxide by reducing triuranium octoxide in H 2 atmosphere shows disadvantages in low safety and unstable quality in O/U ratio. In this paper, an effective method was proposed to fabricate stoichiometric uranium dioxide (UO 2.000 ) powder, in which triuranium octoxide was directly electro-reduced to uranium dioxide in molten salt. The mechanism was analyzed and the quality of prepared sample was verified by XRD, Raman spectra and TG/DSC measurements.
ISSN:	0236-5731 1588-2780
DOI:	10.1007/s10967-022-08227-y