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A kind of method using polar aprotic organic solvent electrodeposition to prepare erbium metal thin film

A polar aprotic and organic solvent technology, applied in the field of low-temperature electrodeposition of rare earth metals, can solve the possibility of increasing the production cost of ionic liquids and environmental pollution, reduce the green characteristics of ionic liquids, and have no large-scale practical application background. Good chemical and thermal stability, improved working environment, excellent solubility effects

Active Publication Date: 2020-04-28
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of ionic liquids is complicated, the exchange reaction is not complete, there are competing reactions and by-products, and the obtained products need to be purified and separated in multiple steps, which significantly increases the production cost of ionic liquids and the possibility of environmental pollution, and reduces the ionic liquid. green character of the liquid
However, the water content in the final ionic liquid product cannot be guaranteed, which seriously affects the process of preparing active metal erbium film by ionic liquid electrodeposition.
On the other hand, conventional ionic liquids have a narrow electrochemical window and limited solubility for general chlorides (such as magnesium chloride, calcium chloride, rare earth chloride, etc.), and some common ionic liquids have high viscosity and are easy to absorb water in the air, so they are very large The practical application of ionic liquids is limited to a certain extent
Therefore, at present, the development of ionic liquids has a history of one hundred years, but it is limited to scientific research in the field of metal electrodeposition, and there is no large-scale practical application background

Method used

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  • A kind of method using polar aprotic organic solvent electrodeposition to prepare erbium metal thin film
  • A kind of method using polar aprotic organic solvent electrodeposition to prepare erbium metal thin film
  • A kind of method using polar aprotic organic solvent electrodeposition to prepare erbium metal thin film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Prepare the electrolyte raw materials as erbium chloride and lithium nitrate, solvent DMI, stir and mix in the electrolytic cell to form an electrolyte system, wherein the molar concentrations of erbium chloride and lithium nitrate are 0.01mol / L and 0.02mol / L respectively. Control the constant temperature of the electrolyte system at 25°C, the electrolysis voltage is -2.0V (vs Ag), and the cathode material is high-purity aluminum sheet; after 30 minutes of electrolysis, add erbium chloride once to make the concentration of erbium chloride in the system 0.01mol / L; electrolysis for 60 minutes Afterwards, the substrate is collected and preserved together with the sediment. After characterization and testing, the results show that metal erbium can be effectively deposited. The total content of erbium elements detected by ICP is 76.33%. The deposited film obtained by SEM observation is a uniform and dense deposited film, and the thickness of the erbium film is 0.27 microns.

Embodiment 2

[0036] Prepare the electrolyte raw materials as erbium chloride and lithium nitrate, solvent DMI, stir and mix in the electrolytic cell to form an electrolyte system, wherein the molar concentrations of erbium chloride and lithium nitrate are 0.02mol / L and 0.02mol / L respectively. Control the constant temperature of the electrolyte system at 35°C, the electrolysis voltage is -2.1V (vs Ag), and the cathode material is high-purity copper sheet; after 30 minutes of electrolysis, add erbium chloride once to make the concentration of erbium chloride in the system 0.02mol / L; electrolysis for 60 minutes Afterwards, the substrate is collected and preserved together with the sediment. After characterization and testing, the results show that metal erbium can be effectively deposited. The total content of erbium elements detected by ICP is 77.58%. The deposited film obtained by SEM observation is a uniform and dense deposited film, and the thickness of the erbium film is 0.23 microns.

Embodiment 3

[0038] Prepare the electrolyte raw materials as erbium chloride and lithium nitrate, solvent DMI, stir and mix in the electrolytic cell to form an electrolyte system, wherein the molar concentrations of erbium chloride and lithium nitrate are 0.03mol / L and 0.03mol / L respectively. Control the constant temperature of the electrolyte system at 45°C, the electrolysis voltage is -2.2V (vs Ag), and the cathode material is high-purity aluminum sheet; after 30 minutes of electrolysis, add erbium chloride once to make the concentration of erbium chloride in the system 0.03mol / L; electrolysis for 60 minutes Afterwards, the substrate is collected and preserved together with the sediment. After characterization and testing, the results show that metal erbium can be effectively deposited. The total content of erbium elements detected by ICP is 97.85%. The deposited film obtained by SEM observation is a uniform and dense deposited film, and the thickness of the erbium film is 0.26 microns. ...

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Abstract

The invention relates to a method for preparing erbium metal thin films by electrodeposition using polar aprotic organic solvents, and belongs to the field of low-temperature electrodeposition of rare earth metals. A method for preparing erbium metal films by electrodeposition using polar aprotic organic solvents, including the following process steps: dissolving lithium nitrate in DMI to obtain a DMI electrolyte of lithium nitrate; placing the DMI electrolyte of lithium nitrate in an electrolytic cell , then add anhydrous erbium chloride to it, stir and mix in the electrolytic tank to form a uniform system, control the temperature of the entire system at 25~60℃, and the electrolysis voltage range -2.0~-2.4V vs Ag; electrodeposition process During the period, anhydrous erbium chloride is added to the electrolytic cell at regular intervals, and the molar concentration of erbium chloride is controlled to be ±2% of the initial concentration. The method of the present invention can efficiently prepare a rare earth metal erbium film while significantly reducing energy consumption and production costs.

Description

technical field [0001] The invention relates to a method for preparing an erbium metal film by electrodeposition of a polar aprotic organic solvent, and belongs to the field of low-temperature electrodeposition of rare earth metals. Background technique [0002] Rare earth is known as the "gold" of industry. Because of its excellent optical, electromagnetic and other physical properties, it can be combined with other materials to form a wide variety of new materials with different properties. Its most notable function is to greatly improve the quality and performance of other products. . For example, the tactical performance of steel, aluminum alloy, magnesium alloy, and titanium alloy used to manufacture tanks, aircraft, and missiles has been greatly improved. Moreover, rare earths are also lubricants for many high-tech industries such as electronics, lasers, nuclear industry, and superconductivity. Once rare earth technology is used in the military, it will inevitably br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/66
CPCC25D3/665
Inventor 石忠宁张保国姚宇胡宪伟高炳亮王兆文
Owner NORTHEASTERN UNIV LIAONING