An integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by arc plasma method

Abstract

The invention discloses an integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by an arc plasma method. The method includes: using a rare earth metal gadolinium block as a first anode, a tungsten rod as a first cathode, and placing the first cathode and the first anode in an electric arc furnace, after the electric arc furnace is evacuated for the first time, and then charged into the first cathode. a plasma gas and start the arc, so that the impurities in the rare earth metal gadolinium ingot are removed in the form of volatilization to obtain rare earth metal gadolinium ingot with higher purity; the rare earth metal gadolinium ingot located in the electric arc furnace is used as the second anode, located in the arc furnace The tungsten rod in the furnace is used as the second cathode. After the electric arc furnace is evacuated for the second time, the second plasma gas is charged and the arc is started, and the products on the inner wall of the reaction chamber of the electric arc furnace are collected to obtain gadolinium oxide nanomaterials. The above method has the advantages of simple operation, excellent environment, good purification effect, high efficiency and high product purity, and realizes the integration of metal purification by arc plasma method and preparation of metal-based nanomaterials.

Description

technical field [0001] The invention relates to the field of preparation of rare earth metal nanomaterials, in particular to an integrated method for purifying rare earth metal gadolinium and preparing gadolinium oxide nanomaterials by an arc plasma method. Background technique [0002] Rare earths are valuable strategic resources and are widely used in cutting-edge technology and military industries. Rare earth elements were originally found in minerals in Sweden, and materials containing rare earth elements are called rare earth materials. Rare earth elements include a total of 17 kinds, namely lanthanides - lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium ( Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and two other lanthanides with very similar properties Elements - Scandium (Sc) and Yttrium (Y). Rare earth elements have a specific 4f ...

AI Technical Summary

Problems solved by technology

For example, the vacuum distillation method has relatively large limitations and is only used to purify metals with high vapor pressure near the melting point. Vacuum smelting and electron beam smelting methods have better purification effects, but the samples volatilize greatly during the smelting process and the recovery rate is low. Electromigration and The electrolytic refining process is long, and the risk of metal contamination during the purification process is high

The main problems in the purification of traditional methods are 1: long operation time and low efficiency; 2: difficult to remove gas impurities O and N; 3: high requirements for raw materials and insufficient product purity; 4: poor operating environment, easy to cause secondary pollution

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