Method for preparing gadolinium-iron alloy by molten salt electrolysis

A gadolinium ferroalloy preparation method by molten salt electrolysis uses a graphite crucible as an electrolytic tank, a graphite plate as an anode, a pure pontil as a self-consumption cathode and an iron crucible as a gadolinium ferroalloy acceptor. Gadolinium oxide is added in a GdF3-Lif binary...

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Main Authors WANG ZHIQIANG, CHEN BOYU, ZHOU LIN, LI HONGWEI, WANG YUMIN, YANG QISHAN, LI ZONGAN, ZHAO BIN, YAN SHIHONG, LUAN WENZHOU, PANG SIMING, LI ZHENHAI
Format Patent
LanguageChinese
English
Published 18.06.2008
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS
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Summary:A gadolinium ferroalloy preparation method by molten salt electrolysis uses a graphite crucible as an electrolytic tank, a graphite plate as an anode, a pure pontil as a self-consumption cathode and an iron crucible as a gadolinium ferroalloy acceptor. Gadolinium oxide is added in a GdF3-Lif binary fluoride molten salt electrolyte system. DC is input for the electrolysis to obtain the gadolinium ferroalloy. In the molten salt system consisting of GdF3 and Lif, the using weight percentage ratio of GdF3 to Lif is 60-95 to 40-5. The electrolysis raw material is the gadolinium oxide. The current density of the anode is 0.3-1.5A/cm and the current density of the cathode is 5-25A/cm . The electrolysis temperature is 900-1150 DEG C. the method has the advantages of simple technological process, high current efficiency, high metal yield, stable product quality and small pollution. The gadolinium ferroalloy prepared through the method can be used as the important raw material for novel NdFeB permanent magnetic materia
Bibliography:Application Number: CN20061165134