Preparation method for silver-coated copper powder

A copper powder, silver-copper technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problems of poor quality of silver-coated layer, low efficiency of silver-coated copper powder, etc. Strong, less decomposition of raw materials, and the effect of promoting uniform deposition

Active Publication Date: 2019-10-25
JIAXING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a preparation method of silver-coated copper powder, which is used to solve the technical problems of low silver-coating efficiency on the surface

Method used

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  • Preparation method for silver-coated copper powder
  • Preparation method for silver-coated copper powder
  • Preparation method for silver-coated copper powder

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preparation example Construction

[0043] figure 1 It is a method flowchart of a method for preparing silver-coated copper powder shown according to an exemplary embodiment, such as figure 1 Shown, the preparation method of this silver-coated copper powder comprises the following steps:

[0044] Step (1): pretreating the copper powder to remove impurities on the surface of the copper powder.

[0045] Step (2): putting the pretreated copper powder into a weak etching solution for weak etching activation treatment to remove the oxide film on the surface of the copper powder.

[0046] Step (3): Put the copper powder after the weak etching and activation treatment into the replacement chemical treatment solution for chemical silver coating, and prepare silver-coated copper powder after cleaning and drying. The components of the replacement chemical treatment solution include inorganic Brightener, organic brightener, silver ion source, silver ion complexing agent, copper ion complexing agent and surfactant, the pH...

Embodiment 1

[0077] A) Put the copper powder into absolute ethanol for the first ultrasonic cleaning to remove the dust and stains on the surface of the copper powder. The temperature of the first ultrasonic cleaning process is 40°C and the time is 5 min.

[0078] B) putting the copper powder after ultrasonic cleaning for the first time into acetone for ultrasonic cleaning for the second time to remove oil stains on the surface of the copper powder.

[0079]C) Put the copper powder after the second ultrasonic cleaning into the degreasing liquid for chemical degreasing to obtain the pretreated copper powder, the components of the degreasing liquid include 12 g / L hydrogen Sodium oxide, 50 g / L of sodium carbonate and 5 g / L of sodium sulfate.

[0080] D) Put the pretreated copper powder into a weak etching solution for weak etching activation treatment to remove the oxide film on the surface of the copper powder. The components of the weak etching solution include 11 mL / L of sulfuric acid , 6...

Embodiment 2

[0087] A) Put the copper powder into absolute ethanol for the first ultrasonic cleaning to remove the dust and stains on the surface of the copper powder. The temperature of the first ultrasonic cleaning process is 42°C and the time is 6 minutes.

[0088] B) putting the copper powder after ultrasonic cleaning for the first time into acetone for ultrasonic cleaning for the second time to remove oil stains on the surface of the copper powder.

[0089] C) Put the copper powder after the second ultrasonic cleaning into the degreasing liquid for chemical degreasing to obtain the pretreated copper powder. The components of the degreasing liquid include 13g / L hydrogen peroxide Sodium, 55 g / L of sodium carbonate and 10 g / L of sodium sulfate.

[0090] D) Put the pretreated copper powder into a weak etching solution for weak etching activation treatment to remove the oxide film on the surface of the copper powder. The components of the weak etching solution include 12 mL / L of sulfuric a...

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Abstract

The invention discloses a preparation method for silver-coated copper powder, and relates to the technical field of advanced electronic materials. The preparation method for the silver-coated copper powder reduces the concentration of silver ions on the surface of copper powder through replacement of silver ion complexing agents in chemical treatment liquid to complex the silver ions; meanwhile, copper ions are uniformly discharged more easily by copper ion complexing agents to accelerate uniform deposition of silver atoms on the surface of the copper powder; and the silver ion complexing agents and the copper ion complexing agents achieve a cooperative acceleration effect, so that the complexing efficiency of the silver ions and the copper ions on the surface of the copper powder is improved, the deposition speed of the silver atoms on the surface of the copper powder is further accelerated, the quick generation and the uniform coverage of silver coating layers on the surface of the copper powder are realized, the technical problems of lower silver coating efficiency on the surface of traditional silver-coated copper powder and weaker quality of the silver coating layers are solved, and the technical effects of improving the surface silver coating effect of the silver-coated copper powder and the silver coating quality are achieved.

Description

technical field [0001] The invention relates to the technical field of advanced electronic materials, in particular to a preparation method of silver-coated copper powder. Background technique [0002] With the development of the electronics industry, the conductivity and thermal conductivity of silver make it an indispensable material for the electronics industry. As a precious metal, silver's price ranged from US$4-6 per ounce in 2001 to US$16.6 per ounce in May 2019. At the same time, more and more electronic products have become fast-consuming electronic products, and long-term service life is no longer the core element. Therefore, silver paste with reduced silver content has become an important development trend of materials. [0003] Metal-coated copper powder has been widely used for its excellent physical and chemical properties, and is an extremely important chemical raw material in traditional manufacturing industries. High-quality multi-metal composite powder ma...

Claims

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Application Information

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IPC IPC(8): B22F1/02C23G1/20C23G1/10B22F9/16
CPCC23G1/20C23G1/103C23G1/068B22F9/16B22F2009/165B22F1/17
Inventor 赵健伟孙志庄再裕于晓辉
Owner JIAXING UNIV
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