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The preparation method of silver powder

A silver powder and solution technology, applied in the field of silver powder preparation, can solve problems such as short reaction time, uniformity of industrialized products, dispersion deviation, etc., and achieve good dispersion effect

Active Publication Date: 2019-03-19
ZHEJIANG GUANGDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when preparing in the laboratory, because the stirring effect is very good, the stirring is very easy to be uniform, and the amount is small and the reaction time is short, it is usually easy to prepare silver powder samples with excellent performance. sex bias

Method used

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  • The preparation method of silver powder

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preparation example Construction

[0034] One aspect of the present invention provides a kind of preparation method of silver powder, comprising:

[0035] Respectively configure the water reaction system A containing silver ions, the reducing agent solution B, and the dispersant solution C;

[0036] Injecting A, B and C into a continuous pipeline reactor, mixing and reacting to deposit silver particles; and drying the silver particles, crushing and sieving.

[0037] Water reaction system A containing silver ions

[0038] As the aqueous reaction system containing silver ions, an aqueous solution or slurry containing silver nitrate, a silver salt complex, or a silver intermediate can be used. Silver salt complexes can be formed by adding ammonia water, ammonium salts, chelating compounds, and the like. Silver intermediates can be prepared by adding sodium hydroxide, sodium chloride, sodium carbonate, and the like. In the water reaction system of the present invention, the concentration of silver ions is prefe...

Embodiment approach 1

[0068] Embodiment 1. A preparation method of silver powder, comprising:

[0069] Respectively configure the water reaction system A containing silver ions, the reducing agent solution B, and the dispersant solution C;

[0070] A, B, and C are injected into a continuous pipe reactor, and the mixed reaction is carried out to deposit silver particles; and

[0071] The silver particles were dried, crushed and sieved.

Embodiment approach 2

[0072] Embodiment 2. The method of Embodiment 1, wherein the silver ion-containing water reaction system A comprises a silver-containing material and pure water.

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Abstract

The invention discloses a preparing method for silver powder. The preparing method for the silver powder comprises the steps that a water reaction system A containing silver ions, a reducing agent solution B containing silver ions and a dispersing agent solution C containing silver ions are prepared; the water reaction system A, the reducing agent solution B and the dispersing agent solution C are injected into a continuous pipeline type reactor to be mixed for the reaction, and accordingly silver particles are deposited; and the silver particles are dried, ground and screened, and the silver powder is obtained.

Description

technical field [0001] The invention relates to a method for preparing silver powder, more particularly, the invention relates to a method for preparing silver powder used in electronic components. Background technique [0002] Metal silver has excellent electrical conductivity, thermal conductivity and oxidation resistance, and is widely used in the electrical and electronic industries. Silver materials can be applied to electronic components, including internal electrodes of multilayer capacitors, printed circuits of circuit boards, solar cell electrodes, conventional conductive pastes for electrodes of plasma display panel (PDP) substrates, usually by mixing silver powder in an organic vehicle , glass powder and inorganic additives, etc., are made by stirring, grinding and rolling, among which silver powder accounts for the highest mass fraction, and the quality of silver powder greatly affects the performance of the final paste. As the size of these electronic component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
CPCB22F9/24B22F2999/00B22F2202/01
Inventor 唐元勋柴良李兴亮肖强
Owner ZHEJIANG GUANGDA ELECTRONICS TECH
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