The current research situation of metals or alloys in molten salt deoxidation is introduced. The major investigation on effect factors of porosity and conductivity are reviewed, including the doping, the forming pressure and sintering temperature effecting the cathode porosity, and the doping, sintering temperature and sintering atmosphere effecting the cathode conductivity. The relation of porosity,conductivity and electrolysis efficiency are analyzed, indicating that increasing porosity, O2- proliferation and the wider of cathode surface may be promoted. Then the electro-deoxidation is promoted. The cathode conductivity depends on the formation of oxygen vacancies, and increasing oxygen vacancies may improve cathode conductivity, and then improve electrolysis efficiency. The future research will focus on improving the reasonable matching between porosity and conductivity of the cathode, optimizing and discussing effect factors etc in order to improve the electrolysis efficiency.%简要介绍了熔盐电脱氧工艺制备金属或合金的研究情况.重点评述了掺杂、成形压力和烧结温度对阴极孔隙率以及掺杂、烧结温度和烧结气氛对阴极半导体化的影响,分析了阴极孔隙率和半导体化与电解效率的关系:增大阴极孔隙率,促进O2-扩散和迁移,增加阴极有效反应面积,有利于电解脱氧；增加阴极氧空位有利于增强其导电性,从而提高电解效率.展望了今后的研究方向,提出了阴极孔隙率和半导体化之间合理平衡、影响因素的优化和探讨等以提高电脱氧效率.
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