Electrolyte system using pulse-electrodeposition method to prepare superfine magnetic metal powder

Abstract

The invention provides an electrolyte system using a pulse-electrodeposition method to prepare superfine magnetic metal powder. The electrolyte system comprises electrolyte, a pH buffering agent and adispersing agent, wherein the electrolyte is the sulfate or chlorate of metal; the concentration of metal ions in the electrolyte is 0.5-2mol / L, the concentration of the pH buffering agent in the electrolyte system is 5-10g / L, and the concentration of the dispersing agent in the electrolyte system is 0.5-12g / L. The electrolyte system has the advantages that the dispersing agent is added into theelectrolyte system, product forming and particle size and morphology regulation and control are achieved by using the synergistic effect of the dispersing agent and the electrolyte system under the stable pH regulated and controlled by the pH buffering agent, the superfine magnetic metal powder obtained through electrolyte circulating is uniform in particle, narrow in particle size distribution and good in dispersity, and the yield and purity of products prepared by the electrolyte system are effectively increased.

Description

technical field [0001] The invention belongs to the technical field of magnetic nano powder preparation, and more specifically relates to an electrolyte system for preparing ultrafine magnetic metal powder by a pulse-electrodeposition method. Background technique [0002] As a new material, nano magnetic powder exhibits unique physical, chemical and electromagnetic properties different from conventional magnetic materials, and has a wide range of applications in the fields of machinery, electronics, optics, magnetism, chemistry and biology, and is widely used in the world It plays an extremely important role in the national economy and military fields. At present, the commonly used preparation methods of magnetic nanoparticles include gas phase reaction method, co-precipitation method, hydrolysis method and electrodeposition method. [0003] Among them, the gas phase reaction method is a method that utilizes the chemical reaction of compound vapors. Although this method can...

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Problems solved by technology

[0003] Among them, the gas phase reaction method is a method that utilizes the chemical reaction of compound vapors. Although this method can synthesize better nano-powders, it is not effective for the preparation of non-volatile substances; Substances are reacted to form insoluble hydroxides, carbonates, sulfates, etc., and then heated to decompose into ultrafine powders. Although this method is simple and easy, the resulting ultrafine powders have many impurities and serious agglomeration and other problems, and the preparation of some metal simple substances is not easy to achieve; the hydrolysis method is to directly separate and manufacture the required high-purity ultrafine powder from the solution of the substance, because a large amount of expensive organometallic compounds are required when using the hydrolysis method, resulting in production The cost is increased, and there are problems such as polluting the environment and slow reaction process; while the electrodeposition method refers to the process of electrochemical deposition of metals or alloys from their compound aqueous solution, non-aqueous solution or molten salt. Compared with other methods, the electrodeposition method has With the characteristics of convenient operation, simple equipment, low energy consumption and wide application range, electrodeposition has become a research hotspot in the preparation of nano-magnetic powders.

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