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Controlled synthesis of tantalum-based solid solution and exploration of electrochemical properties as soluble anode for molten salt electrolysis
International Journal of Refractory Metals & Hard Materials ( IF 4.2 ) Pub Date : 2024-09-13 , DOI: 10.1016/j.ijrmhm.2024.106888
Xuena Men , Zepeng Lv , Shaolong Li , Jilin He , Jianxun Song

Metal oxycarbide solid solution possesses an extensive potential applications due to its remarkable physical features. In this paper, TaCxO1-x solid solution is successively and controllably synthesized by carbothermal reduction of Ta2O5. Based on the thermodynamic calculation, the possible reactions under different conditions in the carbothermal reduction process were analyzed, which provides theoretical guidance for controllable regulation and optimization of carbon thermal reduction process. The effects of carbon content, sintering temperature, and holding time on the synthesis of TaCxO1-x solid solution were investigated and the ideal process parameters for the synthesis of single-phase solid solution were identified. A single-phase solid solution with a carbon‑oxygen ratio close to 1:1 can be created as a soluble anode if the synthesis temperature is 1500 °C, the holding period is 6 h, and the molar ratio of C/Ta is 3.42. Moreover, the process feasibility of preparing metal tantalum by electrolysis of tantalum-based soluble anode is discussed, which provides a new method for metal tantalum preparation.

中文翻译:


钽基固溶体的受控合成和作为熔盐电解可溶性阳极的电化学性能的探索



金属碳化物固溶体由于其卓越的物理特性而具有广泛的潜在应用。本文通过碳热还原 Ta2O5 相继可控合成了 TaCxO1-x 固溶体。基于热力学计算,分析了碳热还原过程中不同条件下可能发生的反应,为碳热还原过程的可控调控和优化提供了理论指导。研究了碳含量、烧结温度和保温时间对 TaCxO1-x 固溶体合成的影响,并确定了合成单相固溶体的理想工艺参数。如果合成温度为 1500 °C,保持期为 6 h,C/Ta 的摩尔比为 3.42,则可以制备碳氧比接近 1:1 的单相固溶体作为可溶性阳极。此外,讨论了电解钽基可溶性阳极制备金属钽的工艺可行性,为金属钽的制备提供了一种新的方法。
更新日期:2024-09-13
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