Silver paste suitable for ceramic filter spraying and its preparation, spraying and film-forming method

A technology of ceramic filter and silver paste, which is applied in the manufacture of conductive/semiconductive layer equipment, conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, etc., can solve the problem of printing silver paste and dipping Silver paste can not meet the metallization process, screen printing process can not achieve metallization, unfavorable mass production of ceramic filters, etc., to achieve the effect of enhancing storage stability, improving storage stability, and storage stability

Active Publication Date: 2022-03-18
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the metallization process used in ceramic filters is mostly screen printing silver paste, but the screen printing process is only suitable for metallization of filters with flat surfaces, because the filter surface needs to be fully metallized, even for bulk devices. Printing on the 6 sides separately, drying 6 times, the production efficiency is low, and the joints at the corners are often too thick or the porcelain is missing, which is not conducive to the mass production of ceramic filters; and for multi-cavity ceramic filters, due to Its internal structure is complex, with structures such as holes and grooves, and the screen printing process cannot achieve full-surface metallization
In addition, there is also a dip-coating process to complete the surface metallization of ceramic filters with complex structures. However, in the process of dip-coating, the amount of silver paste is relatively large, so it needs to be centrifuged to get rid of the excess paste. The placement of the device will lead to the accumulation of some holes in the silver layer, and the thickness of the upper and lower layers of the device will also vary due to different centrifugal radii.
With the development of filter technology and the introduction of large-size and special-shaped products of various designs, printing silver paste and dip-coating silver paste are far from meeting the requirements of the metallization process

Method used

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  • Silver paste suitable for ceramic filter spraying and its preparation, spraying and film-forming method
  • Silver paste suitable for ceramic filter spraying and its preparation, spraying and film-forming method
  • Silver paste suitable for ceramic filter spraying and its preparation, spraying and film-forming method

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Experimental program
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Effect test

Embodiment 1

[0022] A silver paste suitable for ceramic filter spraying, comprising the following components in terms of mass percentage: 78% silver powder, the silver powder includes spherical silver powder and flake silver powder, the particle size D50 of the spherical silver powder is 0.5-2.5 μm, flake The particle size D50 of spherical silver powder is 2-5μm, the weight ratio of spherical silver powder and flake silver powder in silver powder is 10:1, glass powder 2%, 0.8% Bi 2 o 3 , hydroxy acrylic resin 10%, propylene glycol methyl ether acetate 8%, 0.4% leveling agent EFKA3777, 0.4% polyether modified siloxane, 0.3% sodium dodecyl sulfonate, 0.1% pine tar, The chemical structural formula of described hydroxyl acrylic resin is:

[0023]

[0024] In the formula, n is 3, R 1 For polyoxyethylene or polyoxypropylene, R2 is an alkyl group, the molecular weight of the hydroxy acrylic resin is 1200-1400, and the viscosity is 1100-1300mPa.s.

[0025] The glass powder is obtained by mix...

Embodiment 2

[0029] The difference between embodiment 2 and embodiment 1 is that a silver paste suitable for ceramic filter spraying includes the following components in terms of mass percentage: 80% silver powder, and the silver powder includes spherical silver powder and flake silver powder, spherical silver powder The particle size D50 of silver powder is 0.5-2.5 μm, the particle size D50 of flake silver powder is 2-5 μm, the weight ratio of spherical silver powder and flake silver powder in silver powder is 4:1, glass powder 1%, 0.5% CuO, hydroxyacrylic acid 9.5% resin, 7% terpineol, 0.4% leveling agent EFKA3777, 0.4% polyether modified siloxane, 0.2% sodium dodecyl sulfonate, 0.2% pine tar.

Embodiment 3

[0031] The difference between embodiment 3 and embodiment 1 is that a silver paste suitable for ceramic filter spraying includes the following components in terms of mass percentage: 75% silver powder, and the silver powder includes spherical silver powder and flake silver powder, spherical silver powder The particle size D50 of silver powder is 0.5-2.5 μm, the particle size D50 of flake silver powder is 2-5 μm, the weight ratio of spherical silver powder and flake silver powder in silver powder is 5:1, glass powder 1.5%, 0.5% Bi 2 o 3 , 12% hydroxyl acrylic resin, 10% alcohol ester twelve, 0.4% leveling agent EFKA3777, 0.4% polyether modified siloxane, 0.2% 2-ethyl-4-methylimidazole.

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Abstract

The invention discloses a silver paste suitable for ceramic filter spraying, which comprises the following components in terms of mass percentage: 75-82% of silver powder, 0.2-3% of glass powder, 0.5-1% of aging adhesion promoter, Resin 8-14%, organic solvent 7-15%, auxiliary agent 1-3%; the resin is a hydroxyacrylic resin, the molecular weight of the hydroxyacrylic resin is 1000-5000, and the viscosity is 1000-4000mPa.S. The invention also discloses a preparation method and a film-forming method of the silver paste suitable for spraying on the surface of the ceramic filter. The silver paste of the invention enhances the storage stability, can adapt to the metallization of the surface of the ceramic filter with complex structure and special shape, improves the strength of the silver paste dry film, and improves the adhesion between the silver film and the ceramic surface of the filter. The preparation process and spraying process of the silver paste of the present invention are simple, the silver film after sintering is firm, not easy to fall off, uniform in thickness, and can be adapted to mass production of ceramic filters.

Description

technical field [0001] The invention relates to the technical field of silver paste, in particular to a silver paste suitable for spraying a ceramic filter and a preparation and film-forming method thereof. Background technique [0002] With the great development of 5G infrastructure industry, the key component of 5G base station - 5G ceramic dielectric filter will also usher in a big explosion. Metallizing the surface of the ceramic filter with silver paste is a connecting link in the whole process of the ceramic filter, which determines whether the ceramic filter has the possibility of mass production. [0003] At present, the metallization process used in ceramic filters is mostly screen printing silver paste, but the screen printing process is only suitable for metallization of filters with flat surfaces, because the filter surface needs to be fully metallized, even for bulk devices. Printing on the 6 sides separately, drying 6 times, the production efficiency is low, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00
CPCH01B1/22H01B13/00H01B13/0026
Inventor 杨爱民司留启白宝柱
Owner JIANGSU HOYI TECH
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