论文部分内容阅读
以直接电解脱氧法(FFC法)电解氧化镝制取金属镝工艺为主要研究范畴。实验以烧结Dy2O3试样为阴极,高纯石墨棒为阳极,于CaCl2熔盐中电解脱氧。结合电脱氧理论系统研究了试样的成型压力、烧结温度以及烧结时间对所得阴极电解过程及产物脱氧率的影响。同时,结合对各条件下阴极片体的微观形貌的分析结果及电脱氧产物XRD谱图分析,得到了阴极制备工艺的适宜条件。实验结果表明:直接电脱氧法制备金属镝工艺是可行的,微孔阴极中的颗粒连通性好、颗粒尺寸小、孔隙率高均有利于电脱氧进行。实验得到的最佳电极制备条件为:成型压力为15 MPa、烧结温度为1200℃、烧结时间为8 h。
The direct electrolytic deoxidation (FFC method) electrolysis of dysprosium to obtain metal dysprosium process as the main research areas. Experiments to sintered Dy2O3 cathode samples, high-purity graphite rod anode, CaCl2 molten salt electrolysis deoxygenation. The effects of forming pressure, sintering temperature and sintering time on the cathodic electrolysis process and product deoxidation rate were studied based on the theory of electro-deoxidation. At the same time, with the analysis of the morphology of the cathode sheet under various conditions and the XRD pattern analysis of the electro-deoxidation products, the suitable conditions of the cathode preparation process were obtained. The experimental results show that the preparation of metallic dysprosium by direct electro-deoxidation is feasible. The microporous cathode has good particle connectivity, small particle size and high porosity. The optimum electrode preparation conditions were as follows: molding pressure 15 MPa, sintering temperature 1200 ℃, sintering time 8 h.