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Preparation method of superfine silver powder for electronic material

An electronic material and ultra-fine silver technology, which is applied in the field of preparation of ultra-fine silver powder for electronic materials, can solve the problems of low cost, unsatisfactory properties such as the purity and particle size of the ultra-fine silver powder, and the comprehensive performance of the ultra-fine silver powder is not good enough.

Inactive Publication Date: 2014-12-03
TAICANG WUFENG METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical methods mainly include vapor phase evaporation condensation method, grinding method and atomization method; although the physical method is simple and easy to implement, and the cost is also low, the comprehensive performance of the prepared ultrafine silver powder is not good enough.
The chemical method is to use a reducing agent to deposit one or several metals from their salt or complex aqueous solution in the form of powder. Now most of the ultra-fine silver powder used in industry is prepared by this method, but due to ingredients, process parameters, etc. Many ultra-fine silver powders prepared by chemical methods are not ideal in terms of purity and particle size.

Method used

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  • Preparation method of superfine silver powder for electronic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific preparation method is as follows:

[0019] a) Prepare reducing agent and dispersant solution. The specific preparation process is: first take a certain amount of ascorbic acid, dissolve it in deionized water, and make a reducing agent solution with a concentration of 0.4mol / L; then take an appropriate amount of oleic acid, whose mass is ascorbic acid 3%, dissolved in absolute ethanol to make a dispersant solution with a concentration of 3g / L.

[0020] b) Prepare the reducing solution. The specific preparation process is as follows: first pour the reducing agent solution into a special container equipped with a stirring device, and heat it to 50°C in a water bath; then adjust the stirring speed to 400r / min, and put the prepared Add the dispersant solution into the reducing agent solution, and stir for 10 minutes at a speed of 400r / min, so that the reducing agent is evenly dispersed, and the reducing solution is prepared.

[0021] c) Dropping reduction react...

Embodiment 2

[0024] The specific preparation method is as follows:

[0025] a) Prepare reducing agent and dispersant solution, the specific preparation process is: first take a certain amount of ascorbic acid, dissolve it in deionized water, and make a reducing agent solution with a concentration of 0.6mol / L; then take an appropriate amount of oleic acid, whose mass is ascorbic acid 3%, dissolved in absolute ethanol to make a dispersant solution with a concentration of 5g / L.

[0026] b) Prepare the reducing solution, the specific preparation process is: first pour the reducing agent solution into a special container equipped with a stirring device, and heat it to 60°C in a water bath; then adjust the stirring speed to 400r / min, and put the prepared Add the dispersant solution into the reducing agent solution, and stir for 10 minutes at a speed of 400r / min, so that the reducing agent is evenly dispersed, and the reducing solution is prepared.

[0027] c) Dropping reduction reaction, the sp...

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Abstract

The invention provides a preparation method of superfine silver powder for an electronic material. The preparation method comprises the following steps: a) preparing a reducer and a dispersing agent solution, b) preparing a reductive solution, c) dropwise adding for a reduction reaction, and d) treating reaction sediment. According to the preparation method of superfine silver powder for the electronic material, the preparation method is simple and safe, the efficiency is high, the cost is low, and the prepared superfine silver powder is high in purity, uniform in granularity, small in particle diameter, and easy to produce in large scale.

Description

technical field [0001] The invention relates to an electronic material, in particular to a method for preparing ultrafine silver powder for electronic materials, and belongs to the technical field of electronic materials. Background technique [0002] Electronic materials are the material basis for the development of modern electronics industry and science and technology. They mainly refer to materials used in electronic technology and microelectronic technology, including dielectric materials, semiconductor materials, piezoelectric and ferroelectric materials, conductive metals and their alloy materials. , magnetic materials, optoelectronic materials and other related materials. Electronic materials cover a wide range of materials whose main function is to be optically functional or affect the electrical properties of the product. At present, electronic materials are mainly used in industries such as IC manufacturing, flat panel displays, structures, printed circuit boards...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 潘华锋
Owner TAICANG WUFENG METAL PROD
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