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Silver paste suitable for spraying of ceramic filter, and preparation and spraying film forming methods of silver paste

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: 2020-12-11
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 spraying of ceramic filter, and preparation and spraying film forming methods of silver paste
  • Silver paste suitable for spraying of ceramic filter, and preparation and spraying film forming methods of silver paste
  • Silver paste suitable for spraying of ceramic filter, and preparation and spraying film forming methods of silver paste

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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 0.5-2.5um, flake silver powder The particle size D50 of spherical silver powder is 2-5um, 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 1For polyoxyethylene or polyoxypropylene, R 2 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 o...

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 0.5-2.5um, the particle size D50 of flake silver powder is 2-5um, the weight ratio of spherical silver powder and flake silver powder in silver powder is 4:1, glass powder 1%, 0.5% CuO, hydroxyl acrylic 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: silver powder 75%, and the silver powder includes spherical silver powder and flake silver powder, spherical silver powder The particle size D50 of silver powder is 0.5-2.5um, the particle size D50 of flake silver powder is 2-5um, 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 spraying of a ceramic filter. The silver paste comprises the following components in percentage by mass: 75-82% of silver powder, 0.2-3% of glass powder, 0.5-1% of an aging adhesion promoter, 8-14% of resin, 7-15% of an organic solvent and 1-3% of an assistant, wherein the resin is hydroxyl acrylic resin with a molecular weight of 1000-5000 and aviscosity of 1000-4000 mPa.S. The invention further discloses a preparation method and a spraying film forming method of the silver paste suitable for surface spraying of the ceramic filter. According to the silver paste, storage stability is enhanced, the silver paste can adapt to metallization of the surface of a special-shaped ceramic filter with a complex structure, the strength of a dried silver paste film is improved, and the adhesive force between the silver film and the ceramic surface of the filter is improved. The preparation process and the spraying process of the silver paste aresimple, the sintered silver film is firm, not prone to falling off and uniform in thickness, and the silver paste can adapt 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 Applications(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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