Electro-deoxidation of V₂O₃ in molten CaCl₂-NaCl-CaO

Shu-lan Wang,Shi-chao Li,Long-fei Wan,and Chuan-hua Wang School of Science,Northeastern University,Shenyang 110004,China

摘 要：The electro-deoxidation of V2O3 precursors was studied.Experiments were carried out with a two-terminal electrochemical cell,which was comprised of a molten electrolyte of CaCl2 and NaCl with additions of CaO,a cathode of compact V2O3,and a graphite anode under the potential of 3.0 V at 1173 K.The phase constitution and composition as well as the morphology of the samples were studied by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.3 g of V2O3 could be converted to vanadium metal powder within the processing time of 8 h.The kinetic pathway was investigated by analyzing the product phase in samples prepared at different reduction stages.CaO added in the reduction path of V2O3 formed the intermediate product CaV2O4.

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