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Silver powder surface modification processing method

A technology of surface modification and treatment method, which is applied in the direction of coating, etc., can solve the problem of ion migration of silver conductor paste, and achieve the effect of smooth surface, short time and high efficiency

Inactive Publication Date: 2011-01-26
南京金视显科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of ion migration of silver conductor paste, and provide a method for surface modification of silver powder, that is, to use a coating machine to coat one or several other nanoparticles on the surface of silver powder

Method used

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  • Silver powder surface modification processing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, take by weighing average particle diameter 10nm silver powder 18.18g, the silver powder 181.82g of average particle diameter 1 μ m, (10: 100) pour in coating machine sample tank, figure 1 The left is No. 1 blade, the right is No. 2 blade, Figure 2-4 Corresponding to No. 3-5 cutter heads respectively. Select No. 5 and No. 3 cutter heads for assembly, adjust the speed of the coating machine to 5000r / min, the revolution speed to 30r / min, and the operating time to 3min. Start the operation, and pour out the silver powder after the end. Or shuttle-shaped or superimposed up and down with the annular blade to rotate together. Revolution is provided by the cladding machine itself.

[0021] With above-mentioned modified silver powder 65% (weight ratio), black lead-free glass powder 5%, photosensitive monomer 5%, photoinitiator 5%, organic vehicle 20%, after dispersing and mixing, carry out three-roll rolling, slurry After the material was printed, dried and si...

Embodiment 2

[0022] Embodiment 2, take 1.00g of copper powder with an average particle diameter of 20nm, and 199.00g of silver powder with an average particle diameter of 1 μm

[0023] (1:100), pour it into the sample tank of the coating machine, select the No. 3 knife head and the No. 4 knife head to assemble, adjust the speed of the mixing knife of the coating machine to 10000r / min, the revolution speed of the sample tank to 30r / min, and the running time is 2.5min, start to run, after the end, pour out the silver powder.

[0024] With above-mentioned modified silver powder 65% (weight ratio), black lead-free glass powder 5%, photosensitive monomer 5%, photoinitiator 5%, organic vehicle 20%, after dispersing and mixing, carry out three-roll rolling, slurry After the material was printed, dried and sintered, the test was carried out, and the test results are shown in Table 1.

Embodiment 3

[0025] Embodiment 3, take by weighing average particle diameter 40nm nickel powder 2.96g, average particle diameter 5 μ m silver powder 197.04g

[0026] (1.5:100), pour it into the sample tank of the coating machine, select the No. 5 shuttle-shaped cutter head and the No. 3 cutter head to assemble, adjust the rotating speed of the coating machine to 14000r / min, the revolution speed to 30r / min, and the running time to be 30s. Start running, and when it's over, pour out the silver powder.

[0027] With above-mentioned modified silver powder 65% (weight ratio), black lead-free glass powder 5%, photosensitive monomer 5%, photoinitiator 5%, organic vehicle 20%, after dispersing and mixing, carry out three-roll rolling, slurry After the material was printed, dried and sintered, the test was carried out, and the test results are shown in Table 1.

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Abstract

The invention relates to a silver powder surface modification processing method. Nano-particles are wrapped by a wrapping machine and embedded into the micron-silver hole on the micron-silver surface. The nano-particles can be nano-silver powder, nano-Cu powder, nano-Al powder, nano-Sn powder, nano-Zn powder, nano-Ni powder or nano-In powder. The grain diameter of the nano-particles is 10-50 nanometers, and the grain diameter of the micron-particles is from 1-5 microns. The mass ratio of nano-particles to micron-particles is 1:100 to 15:100. The time of treatment by the wrapping machine is 30s to 3min.

Description

technical field [0001] The invention relates to a method for treating the surface of silver powder. The prepared silver powder can be used as the main material of electronic paste for components in the electronic industry. Background technique [0002] With the development of the times, conductive pastes are widely used in the electronics industry, and silver pastes are more commonly used in conductive pastes. However, there are some disadvantages in the use of silver paste. For example, ion migration is easy to occur under the action of an external electric field, resulting in a short service life of electronic components. The causes of ion migration include the morphology, particle size, uniformity, etc. of the silver powder, but the most important reason is the characteristics of the silver powder itself, so the surface of the silver powder should be modified. [0003] The patent with the notification number CN 1202531C discloses a low-content silver conductive paste. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02
Inventor 申桂侠沈仙林徐建立林保平
Owner 南京金视显科技有限公司