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Nanometer silver wire conductive silver paste and preparing method thereof

A technology of nano-silver wire and conductive silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as the decrease of the adhesion of silver conductors and the shedding of silver particles, and achieve Effect of reducing silver content, improving adhesion, and reducing cost

Active Publication Date: 2015-03-25
SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In specific applications, the content of silver particles in the silver paste should not only consider the stable resistance value, but also be restricted by factors such as curing characteristics, bonding strength, and economical efficiency. Low, the adhesive force of the silver conductor decreases after curing and forming a film, and there is a risk of silver particles falling off

Method used

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  • Nanometer silver wire conductive silver paste and preparing method thereof
  • Nanometer silver wire conductive silver paste and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 10g of silver nitrate, 100g of glycerol, 10g of ammonium chloride, and 20g of polyvinylpyrrolidone to make a mixed solution, and stir and heat the mixed solution at 200°C for 30min. Pass the suspension of the prepared silver nanowires through a 400-mesh filter screen to separate the silver nanowires.

[0026] Weigh 30g of phenolic resin and slowly add it into 30g of butyl soluble anhydride acetate and transfer to a water bath and heat to 60°C and keep heating and stirring for 30 minutes to form an organic vehicle. Add 30g conductive silver wire, 5g glass powder and 1g carbon nanotube, 1g carbon fiber, 1g nano palygorskite, 0.5g polyglycol ether, 1.5g tetraethyl titanate to the organic carrier, and keep stirring for 30 minutes to obtain a conductive Silver paste.

[0027] After curing the conductive silver paste, its volume resistivity was tested to be 3.12Ω·m, and its viscosity coefficient was 12. At the same time, the volume resistivity of the conventional cond...

Embodiment 2

[0029] The preparation of silver nanowires is as in Example 1.

[0030] Weigh 30g of phenolic resin and slowly add it into 25g of butyl soluble anhydride acetate and transfer to a water bath and heat to 60°C and keep heating and stirring for 30 minutes to form an organic vehicle. Add 28g conductive silver wire, 4g glass powder and 1g carbon nanotube, 1g carbon fiber, 1g nano palygorskite, 0.5g polyglycol ether, 1.5g tetraethyl titanate to the organic carrier, and keep stirring for 30 minutes to obtain a conductive Silver paste.

[0031] After curing the conductive silver paste, its volume resistivity was tested to be 3.25Ω·m, and its viscosity coefficient was 10.8.

Embodiment 3

[0033] The preparation of silver nanowires is as in Example 1.

[0034] Weigh 40g of phenolic resin and slowly add it into 30g of butyl soluble anhydride acetate and transfer to a water bath and heat to 60°C and keep heating and stirring for 30 minutes to form an organic vehicle. Add 32g conductive silver wire, 8g glass powder and 2g carbon nanotube, 2g carbon fiber, 2g nano palygorskite, 1g polyglycol ether, 3g tetraethyl titanate to the organic vehicle, and keep stirring for 30 minutes to obtain conductive silver paste .

[0035] After curing the conductive silver paste, its volume resistivity was tested to be 3.15Ω·m, and its viscosity coefficient was 11.4.

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Abstract

The invention discloses a nanometer silver wire conductive silver paste. According to the nanometer silver wire conductive silver paste, nanometer silver wires are used for replacing silver powder on the basis of conventional conductive silver paste. The nanometer silver wire conductive silver paste comprises 28 wt%-32 wt% of conductive silver wires, 25 wt%-40 wt% of resin, 20 wt%-30 wt% of organic solvents, 1 wt%-10 wt% of glass powder and 1 wt%-10 wt% of additives. The small quantity of the nanometer silver wires replace 65 wt% to 75 wt% of silver powder in the conventional conductive silver paste, cost is reduced, and the nanometer silver wires can form a good conductive network so that resistance can be reduced and the electrical conductivity can be improved. Besides, because metal silver content is reduced, the cohesiveness of the prepared conductive silver paste is improved to a certain extent. The combined additives of 20 wt% of carbon nanotubes, 20 wt% of carbon fibers, 20 wt% of nanometer palygorskite, 10 wt% of polyether diol and 30 wt% of tetraethyl titanate are added in, and therefore the conductivity of the conductive silver paste is optimized better while the processability of the conductive silver paste is guaranteed.

Description

technical field [0001] The invention relates to a conductive silver paste, in particular to a nano-silver wire conductive silver paste and a preparation method thereof. Background technique [0002] Electronic paste is generally composed of organic carrier, functional powder and low-melting glass powder bonded at high temperature. It is a product integrating electronics, chemical industry and metallurgy with high technical added value. It has entered the electronic information industry. At the same time as the rapid development stage, electronic conductive paste has also made great progress. With the development of miniaturization and flexibility of electronic components, traditional micron-sized conductive pastes can no longer meet the requirements of low-temperature sintering and multilayer wiring. Conductive silver paste has high application value in solar energy and electronics industry. Silver paste is a viscous paste of a mechanical mixture composed of high-purity (9...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00
Inventor 金闯杨晓明曾金栋
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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