Preparation technique for silver powder for preparing printing paste

A preparation process and printing paste technology, applied in the field of electronic paste, can solve the problems of poor conductivity of conductive silver paste, wide distribution range of silver powder particle size, inconsistent morphology, etc., and achieve easy implementation or adjustment and narrow particle size range. , the appearance of the same effect

Inactive Publication Date: 2016-03-09
成都市天甫金属粉体有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the silver powder produced by the prior art either has a strong agglomeration condition and is not suitable for solar energy front silver paste, touch screen paste, and 3D printers, or the silver powder has a wide particle size distribution and inconsistent appearance, which leads to the use of this silver powder. The conductive silver paste of silver powder has poor conductivity

Method used

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  • Preparation technique for silver powder for preparing printing paste
  • Preparation technique for silver powder for preparing printing paste
  • Preparation technique for silver powder for preparing printing paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation technology of silver powder for printing paste in the present embodiment comprises the following steps:

[0038] Step S100: Add 45,000 g of silver nitrate crystals to 300 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0039] Step S200: adding 25200-40000 g of sodium carbonate crystals into 100 L of hot deionized water, stirring continuously and dissolving it to obtain a sodium carbonate solution;

[0040] Step S300: Take the silver nitrate solution and the sodium carbonate solution respectively, add the sodium carbonate solution into the silver nitrate solution at a flow rate of 2500ml / min under stirring, and continue stirring until complete reaction, to obtain Solution A;

[0041] Step S400: Add 30.96L of 16.5% formaldehyde solution to the solution A at a flow rate of 750ml / min until complete reaction, and control the temperature at 30-40°C during the reaction to obtain solution B; ...

Embodiment 2

[0046] This embodiment is further optimized on the basis of Embodiment 1. In the step S200, 40000 g of sodium carbonate crystals are added to 100 L of hot deionized water.

[0047] A kind of preparation technology of silver powder for printing paste in the present embodiment comprises the following steps:

[0048] Step S100: In the first reactor, add 45,000 g of silver nitrate crystals into 300 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0049] Step S200: In the second reaction kettle, add 40,000 g of sodium carbonate crystals into 100 L of hot deionized water, stir and dissolve to obtain a sodium carbonate solution;

[0050] Step S300: Add the sodium carbonate solution into the silver nitrate solution at a flow rate of 2500ml / min under stirring, and continue stirring until the reaction is complete to obtain solution A;

[0051]Step S400: Add 16.5% formaldehyde solution to the solution A at a flow rate of 750...

Embodiment 3

[0055] This embodiment is further optimized on the basis of embodiment 1. In the step S200, 27500 g of sodium carbonate crystals are added to 100 L of hot deionized water.

[0056] A kind of preparation technology of silver powder for printing paste in the present embodiment comprises the following steps:

[0057] Step S100: In the first reactor, add 45,000 g of silver nitrate crystals into 300 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0058] Step S200: In the second reaction kettle, add 27500 g of sodium carbonate crystals into 100 L of hot deionized water, stir and dissolve to obtain a sodium carbonate solution;

[0059] Step S300: Add the sodium carbonate solution to the silver nitrate solution at a flow rate of 2500ml / min under stirring, and continue to stir until the reaction is complete to obtain solution A;

[0060] Step S400: Add 16.5% formaldehyde solution to the solution A at a flow rate of 750ml / ...

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Abstract

The invention discloses a preparation technique for silver powder for preparing printing paste. The preparation technique comprises the following steps that S100, silver nitrate crystals are used for preparing a silver nitrate solution; S200, sodium carbonate crystals are used for preparing a sodium carbonate solution; S300, the silver nitrate solution and the sodium carbonate solution are fully mixed, so that a solution A is obtained; S400, a formaldehyde solution is added into the solution A till a complete reaction is completed, so that a solution B is obtained; and S500, a nitric acid solution is added into the solution B, the pH value is regulated, stirring continues to be conducted, and the silver powder is obtained. The silver powder prepared through the preparation technique is narrow in particle size distribution range and good in morphology consistency and can be suitable for printing paste of different application systems, and the preparation technique is simple.

Description

technical field [0001] The invention relates to the technical field of electronic paste, in particular to a preparation process for preparing silver powder for printing paste. Background technique [0002] Solar energy is a kind of green energy. People pay more and more attention to it because of its advantages of no pollution, inexhaustibility, and no limitation of geographical resources. Therefore, solar cells have emerged as the times require. A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, the solar cell will generate current, collect and transmit electricity through grid lines and electrodes. The front electrodes and grid lines of solar cells are made of conductive silver paste through high-speed and high-precision screen printing, low-temperature drying, and high-temperature sintering. [0003] The front silver paste of solar cells mainly consists of four parts: silver powder, glass powder, add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
CPCB22F9/24
Inventor 孙征
Owner 成都市天甫金属粉体有限责任公司
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