Abstract
In molten LiCl salt at 973 K, Nd-Si alloy was successfully prepared by direct electro reduction of a mixed oxide of Nd2O3-SiO2 or Nd2O3-Si at a constant potential. The reduction mechanism was studied by CV through metal cavity electrode in conjunction with XRD, SEM and EDS results of the electrolytic products under different conditions. It was found that the reduction process of Nd2O3-SiO2 was carried out in two steps. First, SiO2 was reduced to elemental silicon, and then Nd2O3 was deposited on silicon to form Nd-Si alloys. In addition, the effects of the electrolysis voltage have been investigated. As a result, it was found that the reduction rate increased with the increasing of the electrolysis voltage, and it was easy to prepare pure Nd-Si alloys when the atomic content of silicon was 50% in the mixed oxides. This work first reported the preparation of Nd-Si alloy by direct electroreduction of its oxides.
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