控制镧热还原制备镱原子蒸气密度的工艺研究*

doi:10.13385/j.cnki.vacuum.2025.04.08

Abstract

Abstract: At present, the temperature for preparing ytterbium by lanthanum thermal reduction method in industry is usually set at 1 200 ℃, the yield and purity of ytterbium are high, but the reaction is intense. In view of the fact that some specific engineering fields have strict requirements for atomic vapour density of the reaction product, this article analyses the process and thermodynamics of lanthanum thermal reduction to prepare ytterbium with high purity ytterbium oxide and lanthanum chips as raw materials. The influence of reduction temperature and reducing agent ratio on atomic vapour density were studied. The results show that there is a slight reaction at 650 ℃. At 700-800 ℃, the atomic vapour density increases dramatically with the temperature. The atomic vapour density is above 10¹² cm^-3 over 800 ℃. At 850-1 000 ℃, the purity of the reaction product is not less than 99.79%, when the excess ratio of reducing agent is lower than 100 %, the ytterbium atom vapour density still increases significantly with the increase of reaction temperature.

Key words: lanthanum thermal reduction, ytterbium, vacuum distillation, rare earth, vapour density

CLC Number: O616

HU Linsong, JIN Ce. Research on Control Process of Ytterbium Atomic Vapor Density Prepared by Lanthanum Thermal Reduction[J].VACUUM, 2025, 62(4): 44-48.

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Research on Control Process of Ytterbium Atomic Vapor Density Prepared by Lanthanum Thermal Reduction

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