Solid oxide membrane-assisted electrolytic reduction of solid Cr₂O₃ to Cr in molten CaCl₂ was performed using a sintered porous Cr₂O₃ cathode paired with an yttria-stabilized zirconia (YSZ) tube anode containing carbon-saturated liquid copper alloy. Analyses of the reduction mechanism, ion migration behavior, and effects of cathode pellet porosity and particle size on the electrolysis products and reduction rate revealed that the cathode microstructure and electrolytic conditions were key factors influencing the electrolysis process. Optimal results were obtained when the cathode was characterized by high porosity and a small particle size because this combination of features contributed to ion migration. Good electrochemical activation was observed when cathode pellets prepared by 4 MPa molding followed by 2 h of sintering at 1150°C were applied. The electrode reduction process (Cr³⁺ → Cr²⁺ → Cr) was promoted by high electrode voltages, and Cr metal was efficiently formed. The proposed method appears to be well suited for electrolytic Cr production because it does not require expensive pre-electro-lysis techniques or generate harmful by-products.

使用烧结的多孔Cr ₂ O ₃进行固体氧化物膜辅助将固态Cr ₂ O ₃电解还原为熔融CaCl ₂中的Cr。阴极与含有碳饱和液态铜合金的氧化钇稳定氧化锆（YSZ）管阳极配对。通过对还原机理，离子迁移行为以及阴极颗粒孔隙率和粒径对电解产物和还原速率的影响分析，发现阴极的微观结构和电解条件是影响电解过程的关键因素。当阴极具有高孔隙率和小粒径特征时，可获得最佳结果，因为这种特征组合有助于离子迁移。当施加通过4 MPa模压然后在1150°C烧结2 h制备的阴极丸粒时，观察到良好的电化学活化。电极还原过程（Cr ³⁺ →Cr ²⁺→Cr）被高电极电压促进，有效地形成了Cr金属。所提出的方法似乎非常适合电解铬的生产，因为它不需要昂贵的预电解技术或产生有害的副产物。