一、前言稀土类元素作为提高结构材料性能的微量添加物,含有稀土类元素的各种金属已被实际虚用。从稀土类元素所具有的独特性质来讲,最近,在储氢合金、萤光体、磁钢、光学玻璃等功能性材料领域也已进入实际应用。制造这类稀上元素金属。多使用高融点金属钽(Ta)的坩锅。但是碲土类元素化学活性强,对坩锅材料的腐蚀,以及由此造成的混入稀土类元 First, the introduction of rare earth elements As a trace additive to improve the performance of structural materials, containing a variety of rare earth elements of the metal has been the actual virtual use. In terms of the unique properties of rare earth elements, recently, they have also been put into practical use in the field of hydrogen-absorbing alloys, phosphors, magnets, optical glass and other functional materials. Manufacture of these rare-element metals. More use of high melting point tantalum (Ta) crucible. But tellurium earth element chemical activity is strong, the corrosion of the crucible material, and the resulting mixed rare earth element