采用熔盐电脱氧法制备金属钽，在800 ℃下的CaCl2-NaCl混合熔盐体系内，用烧结后的Ta2O5片体做阴极，高密度石墨碳棒做阳极，在工作电压为3.1 V的条件下进行电解脱氧反应。研究了1000 ℃烧结4小时前后的Ta2O5片体的孔隙率和微观形貌，及阴极片结构对电解还原反应过程的影响，利用XRD分析了电解产物的相组成，采用称重法测量了电解产物的氧含量。结果显示：采用熔盐电脱氧法可以制备出金属单质钽，阴极片的大孔隙率有利于电解脱氧反应的进行，扩散过程是影响熔盐电脱氧反应速度的重要环节。
Tantalum was prepared by electro-deoxidation in a CaCl2-NaCl melt at 800℃. Ta2O5 powders were compacted in to pellets and sintered, and then conducted as a cathode, while a high-density graphite rod as an anode. It was investigated that the porosity and micro-morphology of the sintered Ta2O5 cathode affected the rate of the electro-chemical reduction and the purity of the product. The results showed that high porosity can increase the rate and extent of electro-deoxidation. The diffusion seemed to play an important role in the reduction process.
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