Method for preparing nickel-coated copper composite powder in laboratory through electroplating

Abstract

The invention relates to the technical field of electroplating, in particular to a method for preparing nickel-coated copper composite powder in a laboratory through electroplating. The method is characterized in that by the utilization of a cathode nickel net or a cathode nickel plate and the cooperation of magnetic stirring, the nickel-coated copper powder is quickly and efficiently prepared in the laboratory. The method has the advantages that the problems that under a traditional electroplating condition, when the surface of conductive powder is electroplated, the powder difficultly gathers on a cathode or the plated power is difficultly used as the cathode are solved, through the method, the nickel-coated copper composite powder can be prepared in the laboratory, dispersibility of the powder is very good, nickel coating is complete, and a plating layer is dense and is in a crystalline state.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a method suitable for laboratory electroplating to prepare nickel-coated copper composite powder. Background technique [0002] With the rapid development of modern science and technology, in many fields such as metallurgy, machinery, navigation, electronics, communication, and material protection, it is difficult for a single material to meet some special requirements, so that the research on composite materials has been paid more and more attention and has been rapidly developed. development of. As a type of composite material, metal-coated composite powder has the characteristics of two or more substances, the cladding metal and the coated powder used as the core, so it has become indispensable in many of the above fields. s material. [0003] Due to the scarcity of non-ferrous metal resources, the production and application of non-ferrous metals in many fields is res...

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Problems solved by technology

[0006] At present, there are many methods for preparing nickel-coated composite powders. The current patents for the preparation of typical metal-coated composite powders include: the invention patent with the publication number CN1988973A provides a method for preparing nickel-coated copper powder. Palladium is used as a catalyst, and hydrazine (hydrazine) is used as a reducing agent to prepare nickel-plated copper powder; the document "Technology and Performance Research of Nickel-coated Copper Powder for Electronic Industry" uses palladium chloride as an activator, and hydrazine (hydrazine) is used as a catalyst. The reducing agent coats a layer of nickel on the copper powder; the invention patent with the publication number CN1817512A provides a production method of nickel-coated copper powder. Under the condition of alkaline plating solution, the nickel sulfate solution is heated to 80-90°C , add electrolytic copper powder to adjust the pH to 11.5-13.5, and use hydrazine (hydrazine) as a reducing agent to prepare nickel-coated copper powder; when the above-mentioned documents use hydrazine (hydrazine) as a reducing agent to prepare nickel-coated copper powder, this The deposition rate of nickel in this method is relatively low, the process is complicated, the cost is high, and there are problems such as environmental pollution; the invention patent with the publication number CN101733401A also mentions a method for preparing nickel-clad copper powder under acidic plating solution conditions, and hydrochloric acid treatment The final copper powder is placed in a nickel plating solution, the nickel plating solution is nickel sulfate, sodium hypophosphite, sodium acetate, lactic acid, propionic acid, the pH is controlled to 4-5, the temperature is 80-90°C, and nickel is obtained by plating. Phosphorus-coated copper powder; the document "Preparation of New Ni-Cu Composite Coating" introduces the process of preparing nickel-coated copper powder by composite electroplating: adding copper powder to nickel plating electrolyte containing nickel sulfate, nickel chlorate and boric acid , control the pH value of the electrolyte to 3-4, the temperature to 45-60°C, and the current density to 2-3A / dm 2 , to achieve the purpose of nickel plating on the surface of copper powder, but the experimental conditions are harsh, the cost is high, and the operation is complicated; according to the consideration of the simple operation of the experiment and the improvement of test efficiency, the present invention uses a nickel plate and a nickel mesh as cathodes to uniformly coat the copper powder In the dispersed electroplating solution, the copper powder surface was coated with nickel under vigorous stirring, and the nickel-coated copper powder was successfully prepared in the laboratory by electroplating.

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