【摘要】 以Li F-Dy F₃为熔盐，电解Dy₂O₃,Cu₂O制备Dy-Cu合金过程中，明确Dy₂O₃,Cu₂O溶解度是制定合理加料制度、提高电解效率的关键。采用等温饱和法研究了Dy₂O₃,Cu₂O溶解平衡时间，考察了温度、Dy F₃浓度对单一氧化物（Dy₂O₃或Cu₂O）及混合氧化物（Dy₂O₃与Cu₂O）溶解度的影响，通过最小二乘法对溶解度数据进行了拟合，建立了温度、Dy F₃浓度与Dy₂O₃,Cu₂O溶解度之间的数学回归方程。研究结果表明，Dy₂O₃,Cu₂O在Li F-Dy F₃熔盐中溶解平衡的时间分别为110,120 min，溶解反应为吸热反应。相同温度下，随熔盐中Dy F₃浓度增大，Dy₂O₃的溶解度逐渐增大，Cu₂O溶解度变化较小；在温度为910～1030℃，熔盐中Dy F₃浓度为15%～40%（摩尔分数）时，Dy₂O₃,Cu₂O溶解度分别为0.55%～3.45%,0.39%～0.52%。更多还原

【Abstract】 In the process of preparing Dy-Cu alloy by electrolysis of Dy₂O₃ and Cu₂O with Li F-Dy F₃ as molten salt,clarifying the solubility of Dy₂O₃ and Cu₂O is the key to formulate reasonable feeding system and improve electrolysis efficiency.In this paper,the dissolution equilibrium time and solubility of Dy₂O₃ and Cu₂O were determined by isothermal saturation method.The effects of temperature and Dy F₃ concentration on the solubility of single oxide （Dy₂O₃ or Cu₂O） and mixed oxide （Dy₂O₃ and Cu₂O） were investigated.The mathematical regression equation between temperature,Dy F₃ concentration and the solubility of Dy₂O₃ and Cu₂O was established by least-squares fitting data.The results show that the dissolution equilibrium time of Dy₂O₃ and Cu₂O in Li F-Dy F₃molten salt is 110 and 120 min,respectively.The dissolution reaction is endothermic reaction.At the same temperature,the solubility of Dy₂O₃ gradually increases with the increase of the concentration of Dy F₃ in the molten salt,while the solubility of Cu₂O changes little.When the temperature is from 910 to 1030℃and the molar concentration of Dy F₃ in the molten salt is from 15%to 40%,the solubility values of Dy₂O₃ and Cu₂O are0.55%～3.45%and 0.39%～0.52%,respectively.更多还原