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A kind of preparation method of uv photocuring silver-coated nickel conductive paste

A technology of conductive paste and silver-coated nickel, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of slow curing, high cost of conductive paste, environmental pollution, etc. Achieve the effects of fast curing speed, reduced production cost, and excellent electrical conductivity

Active Publication Date: 2018-01-02
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing UV photocurable silver-coated nickel conductive paste, which solves the problems of high cost, slow curing and environmental pollution of conductive paste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A kind of preparation method of UV photocuring silver-coated nickel conductive paste of the present invention, concrete steps are:

[0023] Step 1, put nickel powder with an average particle size of 5 μm into acetone, stir and disperse fully, let it stand for 8-10 minutes, filter and wash with deionized water, then add it to 5% dilute sulfuric acid for cleaning, and then use deionized Wash with water to neutrality to obtain pretreated nickel powder;

[0024] Step 2, dissolving silver nitrate in distilled water to prepare a solution with a mass concentration of 20 to 25 g / L, then slowly adding concentrated ammonia water with a mass fraction of 28% while stirring, starting to form brown silver hydroxide precipitates, and finally obtaining colorless and transparent silver Ammonia complex solution;

[0025] Step 3: Mix the pretreated nickel powder and silver ammonia complex solution at a mass ratio of 1:1 to 0.5, stir magnetically at a speed of 5,000 to 10,000 rpm, heat in...

Embodiment 1

[0032] Step 1, put nickel powder with an average particle size of 5 μm into acetone, stir and disperse fully, let it stand for 10 minutes, filter and wash with deionized water, then add it to 5% dilute sulfuric acid for cleaning, and then wash with deionized water To neutrality, obtain pretreated nickel powder;

[0033] Step 2, dissolving silver nitrate in distilled water to prepare a solution with a mass concentration of 25g / L, then slowly adding concentrated ammonia water with a mass fraction of 28% while stirring, starting to generate brown silver hydroxide precipitates, and finally obtaining a colorless and transparent silver ammonia complex compound solution;

[0034] Step 3, mix the pretreated nickel powder and silver ammonia complex solution at a mass ratio of 1:0.5, stir magnetically at a speed of 10,000 rpm, heat in a water bath at 90°C for 6 hours, add polyvinylpyrrolidone to react for 2 hours, and then use 7000r / min Leave standstill 3h after the centrifuge centrifu...

Embodiment 2

[0040] Step 1, put nickel powder with an average particle size of 5 μm into acetone, stir and disperse fully, let it stand for 10 minutes, filter and wash with deionized water, then add it to 5% dilute sulfuric acid for cleaning, and then wash with deionized water To neutrality, obtain pretreated nickel powder;

[0041]Step 2, dissolving silver nitrate in distilled water to prepare a solution with a mass concentration of 22g / L, then slowly adding concentrated ammonia water with a mass fraction of 28% while stirring, starting to generate brown silver hydroxide precipitates, and finally obtaining a colorless and transparent silver ammonia complex compound solution;

[0042] Step 3, mix the pretreated nickel powder and silver ammonia complex solution at a mass ratio of 1:0.8, stir magnetically at a speed of 5000rpm, heat in a water bath at 60°C for 6h, add polyvinylpyrrolidone to react for 1h, and then use 5000r / min Leave standstill 1h after the centrifuge centrifugal 10min, pou...

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PUM

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Abstract

The invention discloses a preparation method of UV light-cured silver-coated nickel conductive paste. Pretreated nickel powder and silver ammine complex solution are mixed, heated in a water bath at 60-90° C. for 6 hours, and then added with polyvinylpyrrolidone to react for 1-2 hours. , and then centrifuged and cleaned to obtain silver-coated nickel powder; the photosensitive resin and the silver-coated nickel powder were mixed uniformly to obtain a silver-coated nickel conductive adhesive; the conductive adhesive was screen-printed and irradiated under an ultraviolet lamp. The preparation method of the low-temperature polymer conductive paste of the present invention uses precious metal silver to coat base metal nickel, and the preparation process does not require high-temperature sintering and curing, which effectively reduces the production cost; the prepared silver-coated nickel electronic paste not only has excellent electrical conductivity , can also be stored for a long time.

Description

technical field [0001] The invention belongs to the technical field of conductive paint preparation, and in particular relates to a preparation method of UV light-cured silver-coated nickel conductive paste. Background technique [0002] Conductive coatings are widely used in various fields (such as aerospace, electronic components, etc.) due to their high conductivity and good shielding effectiveness. With the miniaturization and integration of circuits and components, conductive paint, as a connecting material, can be directly screen-printed to form circuits by using its fluidity; on the other hand, electronic products are susceptible to external electromagnetic interference and radiate outwards, resulting in information leakage . Therefore, an electromagnetic shielding conductive paste with good performance has become an important trend of industrial materials. [0003] At present, silver powder doped noble metal conductive paste has been widely used. Although its cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22
Inventor 苏晓磊边慧贾艳屈银虎王俊勃贺辛亥徐洁付翀刘松涛
Owner XI'AN POLYTECHNIC UNIVERSITY
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