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A kind of single-batch large-scale synthetic nano-silver powder production method

A technology of nano silver powder and production method, applied in nanotechnology and other directions, can solve the problems of unusability, poor particle uniformity, existence of large particles, etc., and achieve the effect of strong continuous supply capacity and good dispersion.

Active Publication Date: 2017-08-04
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

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Problems solved by technology

However, there are still many deficiencies in the preparation technology of nano-silver powder. First of all, the existing nano-silver powder preparation technologies are almost all laboratory-level synthetic processes, and their single-batch yields range from tens of grams to hundreds of grams. The cargo capacity is low, and it is difficult to be applied in industrial production; secondly, the particle uniformity of the nano-silver powder product obtained by the existing nano-silver powder preparation technology is poor, and there are large particles; thirdly, the production and storage conditions of the existing nano-silver powder preparation technology are extremely harsh , cannot be used under normal conditions, is still in the experimental product stage, and cannot be applied to large-scale industrial production; finally, the dispersion, particle uniformity, and stability of the nano-silver powder produced by the existing nano-silver powder preparation technology are relatively low Poor, reunion occurs from time to time, it is difficult to apply to industrial production on a large scale

Method used

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  • A kind of single-batch large-scale synthetic nano-silver powder production method
  • A kind of single-batch large-scale synthetic nano-silver powder production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The specific implementation steps of this embodiment are as follows:

[0031] (1) Use natural macromolecular water-soluble colloids with optical rotations in the range of -19.0~-24.0 or +27.0~+30.0 and add them into deionized water to form a colloidal solution;

[0032] (2) Adjust the temperature of the colloidal solution to 40~65°C, then add glucose to it, and stir until it dissolves;

[0033] (3) Use deionized water to configure silver nitrate solution, and add ammonia solution with a mass fraction of 20-40% under stirring until the solution becomes clear and transparent to obtain a silver amine complex ion solution;

[0034] (4) Add the obtained silver ammonium ion solution into the colloidal solution in which glucose is dissolved, the mass ratio of silver nitrate to glucose is 1:0.15~0.45, and it is obtained after the reaction is completed.

[0035] Natural macromolecular water-soluble colloids with optical rotations in the range of -19.0~-24.0 or +27.0~+30.0 are u...

Embodiment 2

[0037] In this embodiment, on the basis of the above-mentioned embodiments, the specific usage amount of each component and various process parameters are optimized, and the specific implementation steps are as follows:

[0038] (1) Add 7.0kg of natural peach gum with an optical rotation in the range of -19.0~-24.0 or +27.0~+30.0 into 240L of deionized water to dissolve it;

[0039] (2) Adjust the temperature of the colloid solution to 50~55°C, then add 4.1kg of glucose to it, and stir until it dissolves;

[0040] (3) Add 27.5kg of silver nitrate to 40L of deionized water to form a silver nitrate solution, and add 27.5L of ammonia solution with a mass fraction of 30% under stirring until the solution becomes clear and transparent to obtain a silver amine complex ion solution ;

[0041] (4) Add the obtained silver ammonium ion solution into the colloid solution in which glucose is dissolved at a rate of 0.45 L / min, and the product is obtained after the reaction is completed. ...

Embodiment 3

[0046] This embodiment optimizes the amount of specific use of each component, and various process parameters, and the specific implementation steps are as follows:

[0047] (1) Add 5.0kg of natural peach gum with an optical rotation in the range of -19.0~-24.0 or +27.0~+30.0 into 200~350L deionized water to dissolve it;

[0048] (2) Adjust the temperature of the colloidal solution to 50~55°C, then add 3.2kg of glucose to it, and stir until it dissolves;

[0049] (3) Add 20.8kg of silver nitrate to 30L of deionized water to form a silver nitrate solution, and add ammonia solution with a mass fraction of 20% under stirring until the solution becomes clear and transparent, and silver amine complex ion solution is obtained;

[0050] (4) Add the obtained silver ammonium ion solution to the colloidal solution in which glucose is dissolved at a rate of 0.3L / min. The mass ratio of silver nitrate to glucose is 1:0.075, and it is ready after the reaction is completed.

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Abstract

The invention discloses a production method of single-batch large-scale synthesis of nano-silver powder, which comprises the following steps: 1) preparing a colloidal solution; 2) adding glucose and dissolving it; 3) preparing silver nitrate into a silver amine complex ion solution; 4) dissolving the obtained The silver ammine ion solution is added to the colloidal solution in which glucose is dissolved for reaction. The present invention adopts natural macromolecular hydrated colloid with a certain degree of optical rotation as a dispersant to obtain nano-silver powder products with good dispersibility and no agglomeration; uses glucose as a reducing agent and silver nitrate to make an aqueous solution of silver amine complex ions, and reduces them at a low speed to obtain particles Uniform, no large particles, nano-silver powder products with a particle size distribution of about 80 nanometers; nano-silver powder can be mass-produced in a single batch, and the continuous supply capacity is strong. After actual production verification, 60 kg of nano-silver powder can be produced in a single batch , In addition, it can be stored at room temperature, and the silver powder can also be stored in various organic solvents required by the customer at the request of the customer.

Description

technical field [0001] The invention relates to the field of electronic paste, in particular to a production method for single-batch large-scale synthesis of nano-silver powder. Background technique [0002] There are many silver powder production technologies at present, and its production mechanism is very simple, that is, silver nitrate reacts with a reducing agent to generate silver powder. However, there are still many deficiencies in the preparation technology of nano-silver powder. First of all, the existing nano-silver powder preparation technologies are almost all laboratory-level synthetic processes, and their single-batch yields range from tens of grams to hundreds of grams. The cargo capacity is low, and it is difficult to be applied in industrial production; secondly, the particle uniformity of the nano-silver powder product obtained by the existing nano-silver powder preparation technology is poor, and there are large particles; thirdly, the production and stor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 孙征
Owner 成都市天甫金属粉体有限责任公司
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