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Silver aluminum slurry for electromagnetic shielding and preparation method thereof

An electromagnetic shielding, silver-aluminum paste technology, used in magnetic field/electric field shielding, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of unstable conductivity, easy oxidation, and poor durability of the paste and other problems, to achieve the effect of saving silver raw materials, broadening limitations, and good economic effects

Inactive Publication Date: 2012-05-23
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of copper and nickel is similar to that of silver, and the price is much lower than that of silver, but it is easy to oxidize, the conductivity is unstable, and the durability of the paste is poor
There are few reports of other types, and it has become one of the research goals to provide people with a kind of high-quality and low-cost conductive paste for electromagnetic shielding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A silver-aluminum paste for electromagnetic shielding, specifically completed according to the following process steps:

[0047] 1) First, add 42g of polyurethane resin into 58g of ethylene glycol ether acetate, heat at a constant temperature at 70°C until completely dissolved, and filter through a 250-mesh standard sieve to obtain an organic carrier;

[0048] 2) Weigh 20g of flake silver powder, 40g of ultrafine aluminum powder, and 10g of organic carrier, and carry out primary mixing in a mixer, then mix 10g of 1,4-dihydroxysulfonate amine, 5g of 2-methyl- 4-Ethylimidazole and 5g of ethylenediaminecarboxylate triglyceride were successively added to the mixer and mixed for 60 minutes, then rolled through a three-roll mill to a fineness of less than 2 μm, and filtered through a 300-mesh standard sieve to obtain silver for electromagnetic shielding. Aluminum paste.

Embodiment 2

[0050] A silver-aluminum paste for electromagnetic shielding, specifically completed according to the following process steps:

[0051] 1) First, add 20 g of acrylic resin into 80 g of ethyl acetate, heat at a constant temperature at 75° C. until completely dissolved, and filter through a 250-mesh standard sieve to obtain an organic carrier;

[0052] 2) Weigh the flake silver powder of 22.5g, the ultrafine aluminum powder of 22.5g, and the organic vehicle of 32g, carry out initial mixing in the blender, then mix the phosphate triester of 7g, the vinyl diphenyl methane of 2.5g, 3.5g The polyvinylpyrrolidone is sequentially added into the mixer and mixed for 30 minutes, then rolled by a three-roll mill to a fineness of less than 3 μm, and filtered through a 300-mesh standard sieve to obtain this aluminum silver paste, which is the product.

Embodiment 3

[0054] A silver-aluminum paste for electromagnetic shielding, specifically completed according to the following process steps:

[0055] 1) First, add 45g of epoxy resin into 55g of methyl isobutyl ketone, heat at a constant temperature at 80°C until completely dissolved, and filter through a 250-mesh standard sieve to obtain an organic carrier;

[0056] 2) Weigh 22g of flake silver powder, 33g of ultrafine aluminum powder, and 33g of organic vehicle, and carry out primary mixing in a blender, then mix 5g of silicone oil, 3g of 2-methyl-4-ethylimidazole, 4g Lactate monoglycerides were sequentially added to the mixer and mixed for 90 minutes, then rolled by a three-roll mill to a fineness of less than 2 μm, and filtered through a 300-mesh standard sieve to obtain this aluminum silver paste, which is the product.

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PUM

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Abstract

The invention discloses silver aluminum slurry for electromagnetic shielding and a preparation method thereof. By accounting in percentage by weight, the silver aluminum slurry comprises 50-80 wt% of metal powder, 20-40 wt% of organic carrier, 5-10 wt% of dispersing agent, 2-12 wt% of defoamer and 3-10 wt% of surfactant, wherein the metal powder is composed of flaky silver powder and aluminite powder at the weight ratio of 20:80-80-20. The silver aluminum slurry for electromagnetic shielding replaces pure silver slurry by silver aluminum slurry, obtains the effect of the silver aluminum slurry serving as electromagnetic shielding material by a cheaper price, saves silver raw material, can be used in occasions with harsh environment requirements, such as civil electronic components, precise instruments and the like, and obtains favourable economic effect.

Description

technical field [0001] The invention belongs to the technical field of slurry for electromagnetic shielding, and in particular relates to a silver-aluminum slurry for electromagnetic shielding and a preparation method thereof. Background technique [0002] With the rapid development of information technology, computer networks, information processing equipment, electronic communication equipment and various electrical equipment have been widely used in various industries as carriers of information technology. Instruments are lightweight, high-speed, and digital; electromagnetic signals, because they are susceptible to external electromagnetic interference, will cause malfunctions and cause serious consequences. Therefore, various effective protective measures must be taken to protect them from interference and paralysis. From the perspective of electromagnetic signal leakage and confidentiality, regardless of military secrets or commercial secrets, the leakage of electromagn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00H01B5/14H05K9/00
Inventor 张宇阳
Owner IRICO
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