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Device and method for producing nano silver paste on large scale

A nano-silver paste and production device technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that nano-silver particles cannot be re-dispersed, nano-silver particles melt, and affect nano-silver paste Performance and other problems, to avoid the state of nano-silver dry powder, fast mass transfer and mixing, and solve the problems of agglomeration and oxidation

Active Publication Date: 2017-11-24
深圳原驰三维技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the preparation of nano-silver paste, if nano-silver is also added in the state of dry powder, due to the small size effect and surface effect of nano-silver, nano-silver particles are very easy to agglomerate, resulting in inter-particle melting and serious surface oxidation, resulting in Nano-silver particles cannot be redispersed to nanometer size, and the prepared silver paste has a high oxygen content, which will seriously affect the various properties of nano-silver paste

Method used

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  • Device and method for producing nano silver paste on large scale
  • Device and method for producing nano silver paste on large scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 1 with figure 2 As shown, a large-scale production device for nano-silver paste includes a raw material container, an impingement flow mixer 3, a microwave reactor 5, an ultrasonic growth combination device 10, an ultrasonic stirring growth tank 11, a reverse osmosis membrane desalination device 12, a concentrated Device 13, waste liquid tank 14, silver sol stirring storage tank 15, silver paste auxiliary agent mixing tank 16, stirring mixing device 17 and silver paste storage tank 18, said raw material container includes alcohol raw material dissolving tank 1 and a plurality of silver salt mixing tanks Liquid raw material container, described silver salt mixed liquid raw material container comprises at least the first silver salt mixed liquid raw material dissolving tank 6 and the second silver salt mixed liquid raw material dissolving tank 9; The feed port of the impact flow mixer 3 is connected, and the first silver salt mixed liquid raw material tan...

Embodiment 2

[0065] Adopt the device and the method that embodiment 1 provides to prepare nano-silver paste, comprise the following steps:

[0066] A certain amount of ethylene glycol is placed in the alcohol raw material dissolving tank 1, and a certain amount of silver nitrate, ultrapure water and PVP are added to the first silver salt mixed liquid raw material dissolving tank 6 and the ultrasonic growth combination device 10 according to a certain ratio. The raw material of the second silver salt mixed solution of each ultrasonic growth unit is dissolved in the tank 9, stirred for 30 minutes to make it fully dissolved and mixed. Wherein, the concentration of silver nitrate in the first silver salt mixed liquid raw material dissolving tank 6 is 0.5 mol / L. The concentration of silver nitrate in the second silver salt mixed liquid raw material dissolution tank 9 of each ultrasonic growth unit in the ultrasonic growth combination device 10 is 0.1 mol / L.

[0067] Turn on the first peristalt...

Embodiment 3

[0074] Adopt the continuous reaction system and method that embodiment 1 provides to prepare nano-silver paste,

[0075] A mixture of a certain amount of ethylene glycol and ethanol is placed in the alcohol raw material dissolving tank 1, and a certain amount of silver acetate, ultrapure water and hydroxyethyl cellulose are added to the first silver salt mixed liquid raw material dissolving tank 6 according to a certain ratio. The second silver salt mixed liquid raw material dissolving tank 9 of each ultrasonic growth unit in the ultrasonic growth combination device 10 was stirred for 30 minutes to fully dissolve and mix. Wherein, the concentration of silver acetate in the first silver salt mixed liquid raw material dissolving tank 6 is 2mol / L. The concentration of silver acetate in the second silver salt mixed liquid raw material dissolution tank 9 of each ultrasonic growth unit in the ultrasonic growth combination device 10 is 1 mol / L.

[0076] Turn on the first peristaltic...

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Abstract

The invention provides a device and method for producing nano silver paste on a large scale. The device comprises raw material containers, an impinging stream mixer, a microwave reactor, an ultrasonic growth combined device, an ultrasonic stirring and growing device, a desalter, a concentration device, a silver sol storage container, a silver paste and auxiliary agent mixing container and a stirring and mixing device. The raw material containers comprise the alcohol raw material container and the multiple silver salt mixed liquor raw material containers. The alcohol raw material container and one silver salt mixed liquor raw material container are connected with a feeding opening of the impinging stream mixer. The impinging stream mixer, the microwave reactor, the ultrasonic growth combined device, the ultrasonic stirring and growing device, the desalter, the concentration device and the silver sol storage container are connected with one another in sequence. The silver sol storage container and the silver paste and auxiliary agent mixing container are each connected with the stirring and mixing device. By means of the device and method for producing the nano silver paste on a large scale, the nano silver paste is prepared from silver salt through one step; and the obtained nano silver paste has the beneficial effects of being uniform in composition, adjustable in size, good in dispersity and small in number of impurities.

Description

technical field [0001] The invention belongs to the technical field of preparation of conductive paste, in particular to a large-scale production device and method of nano-silver paste. Background technique [0002] Silver materials are widely used in conductive pastes because of their good electrical conductivity and chemical stability. According to relevant data, in 2016, 561.9 million ounces of silver (about 16,000 tons) were consumed in the industrial manufacturing field, of which 233.6 million ounces were consumed in the electrical and electronic field, 55.4 million ounces were consumed in the welding field, and 76.6 million ounces were consumed in the photovoltaic field. ounces, most of which use conductive silver paste. It can be seen that the market scale of silver conductive paste is very huge. However, the current silver paste mainly uses micron-sized spherical or flake silver particles as conductive components. In order to reduce costs, researchers focused thei...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/054Y02A20/131
Inventor 万军喜敖洪亮戴金洲罗丹妮
Owner 深圳原驰三维技术有限公司