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A kind of production method of tinned copper powder

A production method and technology of tinned copper, applied in liquid chemical plating, transportation and packaging, coating and other directions, can solve the problems of poor compactness, difficult reaction control, complicated operation, etc., and achieve compact structure, convenient operation and simplified process. Effect

Active Publication Date: 2019-11-19
宁波广新纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the copper ions generated by the replacement reaction will diffuse from the surface of the copper powder into the solution, the diffusion requires pores, so the tin-plated layer in the prepared tin-plated copper powder is loose, there must be holes, the compactness is poor, and the powder is prone to oxidation. Loss of good electrical conductivity, limiting the application in the field of conductive materials
[0005] CN103894603B discloses a method for preparing tin-plated copper powder by chemical reduction. Copper sulfate pentahydrate is reduced to obtain copper powder, and then chemically tinned on the surface of copper powder. The tin-plated layer prepared by the reduction method is better than the tin-plated layer prepared by the replacement method. The compactness is good, but the tin plating process needs strong alkali (sodium borohydride and sodium hydroxide), N 2 Carried out under harsh conditions, the reaction is difficult to control, and the operation is complicated; the treatment of the primary body of tin-plated copper powder should be carried out in a high-boiling oil such as an organic solvent (triethanolamine or glycerol), and the tin-plated copper powder Easy to stick, difficult to clean, complex collection process, and poor repeatability, all of which undoubtedly increase the difficulty of production and increase the production cost

Method used

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  • A kind of production method of tinned copper powder
  • A kind of production method of tinned copper powder
  • A kind of production method of tinned copper powder

Examples

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Effect test

Embodiment 1

[0050] A production method of tinned copper powder, comprising the following steps:

[0051] 1) Copper powder cleaning: Take 112g of copper powder produced by the company, add 20ml of 5% dilute sulfuric acid and 0.5% detergent-6503 (3g), ultrasonically stir for 15min, filter and clean, and filter out the water for later use;

[0052] 2) Preparation of tin salt solution: add 12g sodium dodecylsulfonate, 80g diethylenetriaminepentaacetic acid, 40g triethylenetetramine, 13g PVP (polyvinylpyrrolidone), 15.6g stannous sulfate in 8L reverse osmosis water, Stir evenly with 500ml alcohol to obtain tin salt stock solution;

[0053] 3) Preparation of the reaction stock solution: then add the cleaned copper powder to the tin salt solution, ultrasonically disperse for 15 minutes, and mix evenly to obtain the reaction stock solution;

[0054] 4) Powder coating: Add 46g of hydrazine hydrate to a 1L beaker and stir well to obtain a reducing agent solution; then drop the reducing agent solut...

Embodiment 2

[0057] A production method of tinned copper powder, comprising the following steps:

[0058] 1) Cleaning of copper powder: Take 112g of copper powder produced by the company, add 20ml of 5% dilute sulfuric acid and 0.5% of OP-10 (3g), ultrasonically stir for 15 minutes, filter and clean, and filter out the water for later use;

[0059] 2) Preparation of tin salt solution: add 12g of tartaric acid, 80g of ethylenediaminetetraacetic acid, 40g of ethylenediamine, 13g of polyethylene glycol, and 15.6g of stannous sulfate into 8L of reverse osmosis water, and stir evenly with 500ml of alcohol to obtain tin salt stock solution;

[0060] 3) Preparation of the reaction stock solution: then add the cleaned copper powder to the tin salt solution, ultrasonically disperse for 25 minutes, and mix evenly to obtain the reaction stock solution;

[0061] 4) Powder coating: Add 46g of 1-propanol to a 1L beaker and stir well to obtain a reducing agent solution; then drop the reducing agent solu...

Embodiment 3

[0064] A production method of tinned copper powder, comprising the following steps:

[0065] 1) Cleaning of copper powder: Take 112g of copper powder produced by the company, add 20ml of 5% dilute sulfuric acid and 3g of 0.5% sodium lauryl sulfate, stir ultrasonically for 15min, filter and clean, and filter out the water for later use;

[0066] 2) Preparation of tin salt solution: Add 40 g of triethylenetetramine, 13 g of polyacrylic acid, and 15.6 g of stannous sulfate into 8 L of reverse osmosis water, and stir evenly with 500 ml of alcohol to obtain a tin salt stock solution;

[0067] 3) Preparation of the reaction stock solution: then add the cleaned copper powder to the tin salt solution, ultrasonically disperse for 15 minutes, and mix evenly to obtain the reaction stock solution;

[0068] 4) Powder coating: Add 46g of ethylene glycol to a 1L beaker and stir well to obtain a reducing agent solution; then drop the reducing agent solution into a 5L reaction stock solution, ...

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Abstract

The application of the present invention discloses a production method of tinned copper powder, which comprises the following steps: 1) copper powder cleaning; 2) preparation of tin salt solution: dissolving complexing agent, dispersant, tin salt in water and alcohol Mixed solution to obtain tin salt solution; 3) Preparation of reaction stock solution: add the cleaned copper powder to tin salt solution, ultrasonically disperse, mix evenly, and obtain reaction stock solution; 4) powder coating: add reducing agent solution to reaction stock solution 5) After the reaction is completed, filter, wash, dry, and then heat-treat to obtain tinned copper powder. The tin layer of the tin-plated copper powder obtained by the above method is evenly distributed and compact in structure, and the copper-based tin-plated composite material has excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of metal powders, in particular to a production method of tinned copper powder. Background technique [0002] Metal powder refers to a group of metal particles with a particle size of less than 1mm, which can be used as raw materials for powder metallurgy products, and can also be used in many fields such as welding and spraying. The coated powder obtained by coating another metal powder on the surface of the metal powder has better performance and is more widely used. Metal conductive filler (or called conductive paste) is one of the applications of metal coated powder. Metal conductive paste includes gold-based conductive paste, silver-based conductive paste and copper-based conductive paste, which can be used for conductive composite materials, and the performance and cost of conductive fillers are directly related to the conductivity and reliability of conductive composite materials. and economy. Among...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02C23C18/52C23C18/18
CPCC23C18/1658C23C18/1834C23C18/52B22F1/17
Inventor 王翠霞宋书清王锴尧
Owner 宁波广新纳米材料有限公司
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