在真空下,氧化钐直接用镧或混合稀土金属热还原制取金属钐的工艺已普遍采用,一般的做法是,制备高纯金属钐时使用金属镧做还原剂,制备较低纯度金属钐(99%)时则使用廉价的混合稀土金属做还原剂。但由于混合稀土金属含铈量较高(50%左右),车 In vacuum, the direct use of samarium oxide lanthanum or mixed rare earth metal thermal reduction metal samarium process has been widely used, the general approach is to use high-purity metal samarium as a reducing agent to prepare a lower purity metal samarium ( 99%) when using cheap mixed rare earth metal as reducing agent. However, due to the high content of mixed rare earth metal with cerium (about 50%), car