A low-cost electrochemical deposition method for preparing rare earth metal terbium thin films

Abstract

The invention relates to a method for preparing a rare-earth metal terbium thin film through low-cost electrochemical deposition, and belongs to the field of rare-earth metal low-temperature electrodeposition. The method for preparing the rare-earth metal terbium thin film through low-cost electrochemical deposition is characterized by comprising the following process steps: lithium nitrate is dissolved in DMI to obtain a DMI electrolyte of the lithium nitrate, the DMI electrolyte of the lithium nitrate is placed into an electrolytic bath, then anhydrous terbium chloride is added into the electrolytic bath, stirring and mixing are carried out in the electrolytic bath, thus the DMI electrolyte of the lithium nitrate and the anhydrous terbium chloride form a uniform system, the temperature of the whole system is controlled to be 25-80 DEG C, and the electrolytic voltage range is minus 2.0-minus 2.4 V vs Ag; and in the electrodeposition process, anhydrous terbium chloride is replenished into the electrolytic bath every a period of time, and the molar concentration of the terbium chloride is controlled to be the initial concentration + / -2%. According to the method, energy consumption and the production cost are lowered remarkably while the rare-earth metal terbium film is prepared efficiently.

Description

technical field [0001] The invention relates to a method for preparing rare earth metal terbium thin films by electrochemical deposition at low cost, and belongs to the field of low-temperature electrodeposition of rare earth metals. Background technique [0002] Rare earth elements are known as "industrial vitamins", "industrial monosodium glutamate", and "mother of new materials". effect. Due to their great effect and low dosage, rare earths have become an important element to improve product structure, increase technological content, and promote technological progress in the industry. They are widely used in metallurgy, military, petrochemical, glass ceramics, agriculture, and new materials. In particular, terbium is mainly used as an activator for green powder in tricolor phosphors, such as terbium-activated phosphate matrix, terbium-activated silicate matrix, and terbium-activated cerium-magnesium-aluminate matrix. Glows green. In addition, in terms of magneto-optica...

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 terbium films by electrodeposition of ionic liquids.

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

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