Oxygen Solubility of Rarc Earth Mctals.

Rarc Earth Mctals 的氧溶解度。

• 批准号: 07650870
• 负责人: FUJISAWA Toshiharu
• 金额: $ 1.41万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650870/
• 关键词: diffusion couple method; solid state electrotransport; rare earth metals; neodymium; praseodymium; exygen solubility; oxygen; oxygen analysis; フッ化ネオジム; 脱酸素

1. Oxygen AnalysisUsing the device in our laboratory, the analytical procedures of oxygen content in neodymium and praseodymium were studied as a function of flux and temperature. On the basis of the experimental results, optimum conditions for accurate oxygen analysis were obtained at 2873 K with tin concentrations above 0.3 mole fraction for neodymium and above 0.5 mole fraction in the case of praseodymium.2. Oxygen Solubility in Solid Neodymium and PraseodymiumThe oxygen solubility in solid neodymium and praseodymium were determined by diffusion couple method and solid state erectrotransport. Oxygen solubilities in solid neodymium were 0.0774 mass%(1023K), 0.0997 mass% (1073 K), 0.122 mass% (1123 K), 0.136 mass% (1173 K), 0.148 mass% (1223 K) and 0.161 mass% (1248 K) respectively. By the X-ray diffraction analysis, NdO was identified as the equilibrium oxide phase with solid neodymium in the whole temperature range of these experiments. On the other hand, solubility of the oxygen in praseodymium was 0.0595 mass% at 1113 K.3. Oxygen Solubility in Liquid NeodymiumSolubility of oxygen in liquid neodymium was measured by equilibrating the metallic melt with the neodymium oxide (Nd_2O_3) in a molybdenum crucible sealed in quartz capsule. Oxygen solubilities of 0.182 mass% (1373 K), 0.296 mass% (1473 K), and 1.46 mass% (1773 K) were obtained respectively. By the X-ray diffraction analysis, Nd_2O_3 was identified as the equilibrium oxide phase with liquid neodymium at 1473 K.

1.氧分析利用本实验室的装置，研究了钕、镨中氧含量随流量和温度变化的分析方法。根据实验结果，在2873 K下，当锡浓度大于0.3摩尔分数（钕）和大于0.5摩尔分数（镨）时，获得了准确分析氧的最佳条件.氧在固体钕、镨中的溶解度用扩散偶法和固态电迁移法测定了氧在固体钕、镨中的溶解度。固体钕中氧的溶解度分别为0.0774mass%（1023K）、0.0997mass%（1073K）、0.122mass%（1123K）、0.136mass%（1173K）、0.148mass%（1223K）和0.161mass%（1248K）。通过X射线衍射分析，在整个实验温度范围内，NdO被确定为与固体钕的平衡氧化物相。另一方面，在1113 K下，氧在镨中的溶解度为0.0595质量%。氧在液态钕中的溶解度氧在液态钕中的溶解度是通过在密封在石英管中的钼坩埚中使金属熔体与氧化钕（Nd_2O_3）平衡来测量的。氧溶解度分别为0.182质量%（1373 K）、0.296质量%（1473 K）和1.46质量%（1773 K）。X射线衍射分析表明，1473K时Nd_2O_3为与液态钕平衡的氧化物相。