Method for preparing Dy-Ni alloy film through low temperature electrodeposition

Abstract

The invention provides a method for preparing a Dy-Ni alloy film through low temperature electrodeposition. 1-butyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate are mixed according to a mass percent ratio and used as molten salt. The molten salt is heated to 30 to 60 DEG C. A solute is added to the molten salt under stirring, and then stirred for 6 to 8h to acquire molten salt intermediate liquid. Finally, a Pt piece is used as an inert anode, and a high pure copper piece is used a cathode. The molten salt intermediate liquid is electrified for electrolysis, and the current density is controlled to be 0.01 to 0.1 A / cm<2> during electrolysis. The electrolysis time is 1 to 2 h. The Dy-Ni alloy film is acquired on the surface of the cathode. The method provided by the invention has the advantages of simple equipment, low energy consumption, low cost, simple operation, short preparation time, easy control of the thickness range and the like.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing a Dy-Ni alloy film by low-temperature electrodeposition. Background technique [0002] The abundance of dysprosium in the earth's crust is 6ppm, second only to yttrium in the abundance of heavy rare earths, and it is a relatively abundant heavy rare earth element. Due to its unique 4f-shell electronic structure, dysprosium possesses excellent optical, electrical, magnetic, and nuclear properties in addition to its chemical activity as rare earth elements. Dysprosium can be used to manufacture a variety of functional materials and plays an increasingly important role in many high-tech fields. [0003] Dysprosium-nickel alloys have been used in energy and electronic information industries, mainly for high-temperature structural materials and magnetic materials. Dysprosium-nickel alloys are more promising structural materials for nuclear waste di...

AI Technical Summary

Problems solved by technology

[0004] Dysprosium-nickel alloys can also be used in magnetic materials. By adding dysprosium-nickel alloys, the coercive force of sintered NdFeB magnets can be improved. Sintered NdFeB magnets have excellent properties such as high saturation magnetic induction, high coercive force and high magnetic energy product. It plays an important role in the field of hybrid electric vehicles, but the Curie temperature of sintered NdFeB magnets is not high, only 312°C. Working in an environment higher than 200°C will easily cause the high-temperature magnetic properties of the magnets to decay, thereby affecting the use of the motor. Life, in order to ensure the normal operation of the drive motor, the magnet must have a coercive force higher than 2000kA / m at room temperature. Increased from 1713kA / m to 2161kA / m, and the remanence and maximum energy product will basically not decrease

[0005] At present, the preparation methods of Dy-Ni alloy film materials mostly adopt physical methods, such as magnetron sputtering, vacuum evaporation, molecular beam epitaxy and other methods. Harsh and other disadvantages