Rare earth alloy, preparation technique and application thereof

Abstract

The invention relates to a light rare earth base heavy rare earth alloy, a preparation technology and application thereof. The alloy contains 1-40wt% heavy rare earth, and is prepared by oxide fused salt electrolysis process in fluoride molten salt. The electrolyte is composed of rare earth fluoride, lithium fluoride and magnesium fluoride, the compositions are: 65 to 87wt% of base fluoride in rare earth fluoride, 5 to 25wt% of heavy rear earth fluoride, 5-12wt% of lithium fluoride and 0.5 to 3wt% of magnesium fluoride. Since the electric efficiency is larger than 75%, the metal recovery rate is large than 90%, the preparation technology is especially suitable for industrialized mass production.

Description

Technical field: [0001] The invention relates to a light rare earth-based heavy rare earth alloy and an oxide electrolysis preparation process in a fluorine salt system and its application. It belongs to the field of rare earth metallurgy. technical background: [0002] The unique electronic structure of rare earth elements makes them have excellent magnetic, optical and electrical properties, and is widely used in the preparation of functional materials. For example, a large amount of metal praseodymium, neodymium, dysprosium, terbium, etc. With the rapid growth of demand for rare earth functional materials such as magnetic materials, the price of rare earth metals has risen sharply, and magnet manufacturers are facing huge cost pressures. In order to reduce costs, NdFeB enterprises and metal production enterprises are constantly looking for new formulas and new production methods. For example, in recent years, praseodymium neodymium alloys and dysprosium iron alloys with ...

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Problems solved by technology

However, the current efficiency of the process described in the patent fluctuates greatly, the minimum current efficiency is 20%, the max