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A kind of silver powder preparation technology that controls particle size by controlling sodium hydroxide addition amount

A sodium hydroxide and preparation process technology, applied in the field of electronic paste, can solve the problems of limited adaptability, inconvenient adjustment of silver powder particle size, inability to meet various needs, etc., and achieve narrow particle size range, which is conducive to environmental protection , high yield effect

Active Publication Date: 2018-07-17
晶澜光电科技(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing silver powder preparation process, hydrazine hydrate, formaldehyde or sodium hypophosphite are usually selected to react with silver nitrate as a reducing agent, and there are toxic residues in the production waste liquid; and the particle size of the silver powder particles prepared by the existing process is inconvenient Adjustment, limited adaptability, unable to meet various needs of the market

Method used

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  • A kind of silver powder preparation technology that controls particle size by controlling sodium hydroxide addition amount
  • A kind of silver powder preparation technology that controls particle size by controlling sodium hydroxide addition amount

Examples

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Effect test

Embodiment 1

[0038] A kind of silver powder preparation process of controlling particle size by controlling sodium hydroxide addition in the present embodiment comprises the following steps:

[0039] Step S100: taking silver nitrate crystals to prepare silver nitrate solution, sodium hydroxide crystals to prepare sodium hydroxide solution, and glucose crystals to prepare glucose solution; including the following specific steps:

[0040] Step S110: Add 80,000 g of silver nitrate crystals to 83 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0041] Step S120: Add 37300-42504 g of sodium hydroxide crystals into 240 L of deionized water, and stir continuously until all of them are dissolved to obtain a sodium hydroxide solution;

[0042] Step S130: Add 6664g of glucose crystals into 14.4L of hot deionized water, and stir continuously until all are dissolved to obtain a glucose solution;

[0043] Step S200: under stirring, the sil...

Embodiment 2

[0049] This embodiment is further optimized on the basis of Example 1. A silver powder preparation process that controls the particle size by controlling the amount of sodium hydroxide added includes the following steps:

[0050] Step S100: taking silver nitrate crystals to prepare silver nitrate solution, sodium hydroxide crystals to prepare sodium hydroxide solution, and glucose crystals to prepare glucose solution; including the following specific steps:

[0051] Step S110: Add 80,000 g of silver nitrate crystals to 83 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0052] Step S120: Add 42504 g of sodium hydroxide crystals into 240 L of deionized water, and stir continuously until all of them are dissolved to obtain a sodium hydroxide solution;

[0053]Step S130: Add 6664g of glucose crystals into 14.4L of hot deionized water, and stir continuously until all are dissolved to obtain a glucose solution;

[0054...

Embodiment 3

[0059] This embodiment is further optimized on the basis of Example 1. A silver powder preparation process that controls the particle size by controlling the amount of sodium hydroxide added includes the following steps:

[0060] Step S100: taking silver nitrate crystals to prepare silver nitrate solution, sodium hydroxide crystals to prepare sodium hydroxide solution, and glucose crystals to prepare glucose solution; including the following specific steps:

[0061] Step S110: Add 80,000 g of silver nitrate crystals to 83 L of deionized water, and stir continuously until they are all dissolved to obtain a silver nitrate solution;

[0062] Step S120: Add 40572 g of sodium hydroxide crystals to 240 L of deionized water, and stir continuously until all of them are dissolved to obtain a sodium hydroxide solution;

[0063] Step S130: Add 6664g of glucose crystals into 14.4L of hot deionized water, and stir continuously until all are dissolved to obtain a glucose solution;

[0064]...

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Abstract

The invention discloses a silver powder preparing technology for controlling the grain size through control over the adding amount of sodium hydroxide. The technology comprises the following steps that S100, silver nitrate crystals are taken to prepare a silver nitrate solution, sodium hydroxide crystals are taken to prepare a sodium hydroxide solution, and glucose crystals are taken to prepare a glucose solution; S200, in the stirring state, the silver nitrate solution is slowly added in the sodium hydroxide solution, and a solution A is obtained; S300, under the condition that the reaction temperature is 20-30 DEG C, the glucose solution is slowly added into the solution A and constantly stirred till the reaction is thorough, and a solution B is obtained; and S400, the solution B continues to be stirred for a period of time, then solid and liquid separation is carried out, a solid body is taken, washed and dried, and silver powder is obtained. The prepared silver powder is small in grain size distribution range and can be suitable for printing sizing agents of different application systems, toxic and harmful substances do not exist in waste liquid, the grain size of the silver powder can be controlled, and the preparing technology is simple.

Description

technical field [0001] The invention relates to the technical field of electronic paste, in particular to a silver powder preparation process for controlling particle size by controlling the amount of sodium hydroxide added. 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 consist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
CPCB22F9/24
Inventor 孙征
Owner 晶澜光电科技(江苏)有限公司
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