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Preparation method of flake copper powder

A technology of flake copper powder and flake, which is applied in the field of preparation of metal powder materials

Active Publication Date: 2019-06-14
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most of the electroless plating reported in the literature is carried out on the surface of metal conductor materials and non-metallic insulator materials, mainly to achieve the purpose of decorating and protecting the base material, and the research on chemical plating on the surface of compound crystals is scarce. See literature reports; use sheet-like compound crystals as templates to prepare flake metal powders by electroless plating

Method used

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  • Preparation method of flake copper powder
  • Preparation method of flake copper powder
  • Preparation method of flake copper powder

Examples

Experimental program
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Effect test

Embodiment 1

[0059] A preparation method of flake copper powder, the specific steps are as follows:

[0060] 1) Preparation of a mixture containing sublimable flaky compound crystallization template and copper salt: water, copper salt, complexing agent, copper plating brightener, dispersant, antioxidant, nickel salt according to products 1 to 8 in Table 1. With the mass percentage of the sublimable flake compound crystallization template, first mix water, copper salt, complexing agent, copper plating brightener, dispersant, antioxidant and nickel salt, stir until all materials are completely dissolved, and then add sublimable The flaky compound crystal template is stirred and ultrasonically treated for 1-60min. The sublimable flaky compound crystal template is ultrasonically crushed into flaky crystals with a particle size of 0.5-20.0μm, and the sublimable flakes are obtained. A mixture of a crystalline template and a copper salt.

[0061] 2) Preparation of the reducing agent aqueous solution:...

Embodiment 2

[0069] A preparation method of flake copper powder in acid medium, the specific steps are as follows:

[0070] 1) Preparation of flaky acidic compound crystal template: According to the mass percentages of surfactants, acidic compound crystals and water of products 1-8 in Table 2, first mix the water with the surfactant, stir and dissolve completely to obtain the surface Active agent aqueous solution; heat the surfactant aqueous solution to boiling, add acidic compound crystals and stir until fully dissolved, filter while hot to obtain a saturated solution of acidic compound crystals; place the saturated solution of acidic compound crystals in a thermostat controlled at 50°C Medium cooling crystallization, when the temperature of the material drops to 50 ℃, take the material out of the thermostat, and then let the material cool to room temperature naturally, so that the crystallization is complete; the material is filtered to obtain the flake acidic compound crystalline crude prod...

Embodiment 3

[0082] A preparation method of flake copper powder in acid medium, the specific steps are as follows:

[0083] 1) Preparation of flaky basic compound crystal template: According to the mass percentages of surfactants, basic compound crystals and water in products 1-8 in Table 3, first mix the water with the surfactant, stir and dissolve completely, then Obtain a surfactant aqueous solution; heat the surfactant aqueous solution to boiling, add the crystals of the alkaline compound and stir until fully dissolved, filter while hot to obtain a saturated solution of the crystals of the alkaline compound; place the saturated solution of the crystals of the alkaline compound in the temperature control Cool and crystallize in a 50°C incubator. When the temperature of the material drops to 50°C, take out the material from the incubator, and then let the material cool to room temperature to complete the crystallization; the material is filtered to obtain the flaky basic compound crystalline...

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Abstract

The invention discloses a preparation method of flake copper powder. The method comprises the steps of adopting water, copper salt, a complexing agent, a copper plating brightener, a dispersing agent,an antioxidant, nickel salt, a sublimable flake compound crystal template or a crystal template containing an acid compound or a crystal template containing a flake alkaline compound, and a reducingagent as raw materials; adopting a chemical plating method for plating copper on the surface of the compound crystal template until a copper ion is completely reacted; and after finishing reaction, carrying out separation, purification and a processing treatment process, and directly obtaining the flake copper powder without the need for ball milling. The preparation method of the flake copper powder provided by the invention has a series of advantages of low energy consumption, low environment pollution, simple production process, short process route, less large-scale production equipment investment, high production efficiency, low production cost, good product dispersibility and conductivity and the like, is suitable for large-scale production, solves the problem existed in a process forpreparing the flake copper powder through a ball milling method, and is good in industrial prospect.

Description

Technical field [0001] The invention belongs to the technical field of preparation of metal powder materials, and relates to a preparation method of flake copper powder. Background technique [0002] According to the particle shape, the metal powder is divided into four types: spherical, random particle, flake and linear. Different from spherical metal powder and granular metal powder, flake metal powder has excellent catalytic performance, excellent sintering performance, excellent thixotropy performance, excellent adhesion, good shielding effect, excellent electromagnetic wave reflection ability and excellent The conductive properties of the product make it widely used in the fields of chemical catalysis, powder metallurgy, conductive coatings, conductive adhesives, conductive inks and conductive pastes. [0003] At present, most of the fields of chemical catalysis, electromagnetic shielding coatings, radar wave reflective coatings, conductive coatings, conductive adhesives, con...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 刘福生郜伟马国权党增超
Owner NANJING FORESTRY UNIV
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