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Preparation method of silver-coated copper composite powder with zinc intermediate layer

An intermediate layer, silver-coated copper technology, applied in metal processing equipment, coating, transportation and packaging, etc., to achieve the effect of improving anti-oxidation performance and compact packaging

Active Publication Date: 2021-06-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many research reports on the core-shell structure powder with a single coating, but there are few research reports on adding an intermediate layer between the core / shell structure to improve the powder performance. By preparing different intermediate layers, the powder can be effectively improved. A certain aspect of the performance required, and then prepare a powder with better performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weighted copper powder 10g, which was set to 1000 ml of suspension, 1 g of sodium hydroxide, ultrasonic stirring for 3 minutes, then centrifugally separated, after washing.

[0022] (2) Configure mechanical Zn material, adding ultrafine Zn powder 10g, sodium chloride 1g, tin chloride 0.5g, plating Zn deposition promoter (mainly containing Fe salt, Na salt, etc.) into mechanical plating Zn.

[0023] (3) Cu powder mechanical plating Zn, adding the degreasing Cu powder and step (2) of step (1) in mechanical galvanizing machine, the glass ball is used as a shock medium during the plating process, and the glass ball is The diameter is 1 ~ 2 mm, 2 ~ 3 mm, 4 to 5 mm, respectively, and the copper plated 360 ° is reversed, 20 ° ~ 60 ° cycle swing, reaction 10min, filtration, will be obtained Powder wash, dried at 150 ° C for 20 min to give galvanized copper powder;

[0024] (4) Configure a chemically plated Ag solution, silver nitrate 18g, formulated into a solution, and then ad...

Embodiment 2

[0027] (1) Weighted copper powder 10g, which was set to 1000 ml of suspension, 1 g of sodium hydroxide, ultrasonic stirring for 3 minutes, then centrifugally separated, after washing.

[0028] (2) Configure mechanical plating Zn material, 4g of ultrafine Zn powder, 0.5 g of sodium chloride, 0.2 g of tin chloride, plating Zn deposition promoter (mainly Fe Salt, Na salt, etc.) formulated into mechanical plating Zn material ;

[0029] (3) Cu powder mechanical plating Zn, adding the degreasing Cu powder and step (2) of step (1) in mechanical galvanizing machine, the glass ball is used as a shock medium during the plating process, and the glass ball is The diameter is 1 ~ 2 mm, 2 ~ 3 mm, 4 to 5 mm, respectively, and the copper plated 360 ° is reversed, 20 ° ~ 60 ° cycle swing, reaction 10min, filtration, will be obtained Powder wash, dried at 150 ° C for 20 min to give galvanized copper powder;

[0030] (4) Configure a chemically plated Ag solution, referred to silver nitrate, mixed wi...

Embodiment 3

[0033] (1) It is called 5 g of copper powder, and 0.6 g of sodium hydroxide is added to 500 mL, and the mixture is stirred for 3 minutes, then centrifugally, then separated.

[0034] (2) Configure mechanical Zn material, superfine Zn powder 4g, 1 g of sodium chloride, 锡 亚 0.5 g, plating Zn deposition promoter (mainly Fe Salt, Na salt, etc.) formulated into mechanical plating Zn material;

[0035] (3) Cu powder mechanical plating Zn, in the mechanical galvanizing machine, the galvanized liquid is divided into two 50%, first adding the first portion of the degreasing Cu powder and step (2) of step (2). According to the glass ball as a shock medium during the plating, the glass ball is a plurality of specifications of 1 to 2 mm, 2 to 3 mm, 4 to 5 mm, respectively, and copper-plated 360 °. Turning, 20 ° ~ 60 ° cycle swing, reaction 10min, filtration, then adding the remaining galvanized zinc, zinc galvanized in the above steps, washed twice, 150 ° C for 20 min, to obtain galvanized co...

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Abstract

The invention discloses a preparation method of silver-coated copper composite powder with a zinc intermediate layer. The preparation method comprises the following steps of: preparing Cu / Zn / Ag three-layer composite powder by using a method of combining mechanical plating and chemical plating, performing alkali washing and degreasing on Cu powder suspension, preparing a mechanical plating Zn material, performing mechanical plating Zn on Cu powder, washing, preparing chemical plating Ag liquid, performing chemical plating Ag on Cu / Zn powder, washing, and drying to obtain the silver-coated copper composite powder with zinc as the intermediate layer. According to the preparation method, the intermediate layer is added, so that the coating of silver on the outer layer and copper on the inner layer is more compact, and the oxidation resistance of silver-plated copper powder is further improved.

Description

Technical field [0001] The present invention relates to a method for preparing a silver-clad copper composite powder having a zinc intermediate layer, belonging to functional materials and a technical field of powder material. Background technique [0002] As a new composite, silver-clad copper powder, not only overcomes the disadvantages of electron migration in silver powder, but also taking into account good materialization performance and silver powder good conductivity and anti-oxidation resistance. Replacing a precious metal with a base metal, reducing the purpose of production costs, in line with sustainable development requirements. Silver bag copper powder is widely used, which is made of electronic slurry to capacitors, integrated circuits, resistors, and other electronic components, etc., involving great fields, development momentum is rapid, market development prospects, research and development value The potential is great. At present, there are many studies on the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F1/00C23C18/44
CPCC23C18/44B22F1/14B22F1/145B22F1/17
Inventor 贾贤潇刘顺科张文哲葛健
Owner KUNMING UNIV OF SCI & TECH
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