稀土高纯化制备技术.doc

XXXX 学校毕业论文论文题目: 稀土高纯化制备技术院系: 专业: 学号: 姓名: 指导教师: 撰写时间: 1 摘要目前稀土元素的应用蓬勃发展,已扩展到科学技术的各个方面,尤其现代一些新型功能性材料的研制和应用,稀土元素已成为不可缺少的原料。稀土在高技术领域的作用只有在高纯化后,其各项物理、化学特性才能充分发挥出来。如发光材料、激光材料、光电子材料等要求稀土纯度 5N以上;非稀土杂质含量要求越来越低,如Fe、Cu、Ni、Pb等重金属含量要求小于 1×10 -6。因此,高纯化仍将是未来稀土产品的一个发展方向。关键词:稀土高纯化材料 2 Abstract The application of rare earth elements to flourish, has been extended to all aspects of science and technology, in particular the development and application of modern functional materials, rare earth elements has e an indispensable raw materia Rare earth in the field of high technology in high purification effect only after the various physical and chemical characteristics fully play out. Such as luminescence materials, laser materials and photoelectron materials requirements for rare earth purity 5N above; The rare earth miscellaneous nature content requirements, such as Fe, lower Cu, Ni, Pb heavy metal content such as required less than 1x 10 -6. Therefore, high purification will still be the future of rare earth products are a development direction keywords : Rare earth high purification materials 3 目录引言................................................................................................................................ 4 1稀土对现代社会的影响............................................................................................. 5 稀土的用途............................................................................................................. 5 稀土元素在传统产业领域中应用..................................................................... 5 稀土元素在高新技术产业中应用..................................................................... 6 现在生产稀土工艺................................................................................................. 7 熔盐电解............................................................................................................. 7 金属热还原......................................................................................................... 8