Abstract：Based on thermodynamics and kinetics analysis for preparation of metallic ytterbium by the process of lanthanum thermal reduction,preliminary process parameters were determined。By using ytterbium oxide（99.99% purity）as raw material,with electrolytic metal lanthanum of fluoride salt-oxide system as reducing agent，vacuum carbon tube furnace as reaction device，by self-produced receiving device，on vacuum degree<10-2Pa，ytterbium was obtained after one distillation in 1180℃.The results show that metal ytterbium purity（Yb/TRE） was 99.99%，Prepared with the ytterbium metal yield more than 97.84%。Compared with the one time reduction distillation，lanthanum impurity deceased by about 96.5%，the yield of rare earth increased by 4.48%。
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2020, Vol. 27 