Preparation method of rare earth erbium-iron alloy and rare earth erbium-iron alloy

Abstract

The invention relates to a preparation method of a rare earth erbium-iron alloy and the rare earth erbium-iron alloy. According to the method, a graphite crucible is used as an electrolytic bath; a graphite flake is an anode; a pure iron rod is used as a cathode; the iron crucible is a metal receiver; erbium oxide is used as a raw material; the method comprises the following steps of: electrolyzing at the temperature of between 1,090 and 1,110 DEG C with the current of between 4,000 and 4,500 A and the voltage of between 12 and 15 V by taking sodium hydroxide as a cathode, barium fluoride and sodium fluoride as a binary system electrolyte, and drying an electrolytic bath; adding a binary system electrolyte, melting to a certain degree, placing an iron crucible in the center of the furnace bottom, placing a pure iron rod above the iron crucible, and starting electrolysis; adding erbium oxide, and adjusting the purity of the iron rod in time; and after electrolyzing for a period of time, taking out the iron crucible, pouring into an ingot, cooling and demolding to obtain the erbium-iron alloy. In the prepared rare earth erbium-iron alloy, the mass fraction of iron is 15.1%-18.2%, and the mass fraction of erbium is 81.3%-84.4%; the method is low in energy consumption, high in productivity, small in deviation and convenient for large-scale production.

Description

technical field [0001] The invention relates to the related technical field of rare earth erbium-iron alloy, in particular to a preparation method of rare earth erbium-iron alloy and the rare earth erbium-iron alloy. Background technique [0002] There are two main methods for the preparation of erbium-iron alloys: metal doping high-temperature mutual dissolution method and fluoride vacuum calcithermal reduction method. [0003] For the high-temperature mutual-dissolution method, metal erbium is produced first, and then metal erbium and pure iron are used to dissolve each other at high temperature in a vacuum environment, which has the characteristics of simple production method. The impurity content of the erbium-iron alloy produced by the doping method is relatively high, its production energy consumption is high, and the cost is high, and metal erbium can be produced by electrolysis in theory, but because its electrolysis temperature is as high as 1461 ° C, this method pr...

AI Technical Summary

Problems solved by technology

Due to the use of vacuum reduction method for production, its production energy consumption is still high, and expensive vacuum reduction equipment and tungsten, molybdenum crucibles, etc. are required, resulting in high production costs and low production capacity.