CN114446510A - Environment-friendly compound modified conductive silver paste and preparation method thereof - Google Patents
Environment-friendly compound modified conductive silver paste and preparation method thereof Download PDFInfo
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- CN114446510A CN114446510A CN202210167489.6A CN202210167489A CN114446510A CN 114446510 A CN114446510 A CN 114446510A CN 202210167489 A CN202210167489 A CN 202210167489A CN 114446510 A CN114446510 A CN 114446510A
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- environment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
Abstract
The invention discloses an environment-friendly compound modified conductive silver paste and a preparation method thereof, the environment-friendly compound modified conductive silver paste comprises 75-85 parts of compound silver powder, 8-15 parts of high-performance lead-free glass powder, 15-25 parts of an organic carrier, 1-5 parts of a silver paste auxiliary agent and 0.5 part of methyl cellulose, the compound silver powder and the 3/5 organic carrier are mixed and then heated and stirred uniformly at 70-110 ℃, then the mixture is dispersed by a grinder to obtain silver powder slurry, the high-performance lead-free glass powder and the 2/5 organic carrier are mixed and then heated and stirred uniformly at 70-110 ℃, then the mixture is dispersed by the grinder to obtain glass slurry, the silver powder slurry and the glass slurry are further mixed and ground uniformly to obtain the environment-friendly conductive silver paste, the particle size of the environment-friendly conductive silver paste is 2.0-8.0 mu m, the viscosity is 250-290 Pa.s, the thixotropic index is 5.0-7.0, and then 5% of the methyl cellulose is added into the environment-friendly conductive silver paste, and then fully mixing, and the mixed conductive silver paste has excellent toughness, flexibility and transparency after being cured.
Description
Technical Field
The invention discloses an environment-friendly compound modified conductive silver paste and a preparation method thereof, and belongs to the technical field of conductive silver paste preparation.
Background
The conductive silver paste is a conductive substance formed by mixing silver powder and vaseline according to a certain proportion so as to increase the conductivity and reduce the conductive contact resistance without generating heat, and is generally used at a connecting joint (coated with a point of conductive paste) of electrical equipment so as to increase the conductivity of the connecting joint.
In the prior art, the prepared conductive silver paste has certain instability after being coated and cured, and can not be effectively attached to the surface of a part, and the cured gel is softer and cannot sufficiently protect the part.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, conductive silver paste has certain instability after being coated and cured, the conductive silver paste can not be effectively attached to the surface of a part, and cured gel is soft and can not sufficiently protect the part, and provides an environment-friendly compound modified conductive silver paste and a preparation method thereof, so that the problems are solved.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly compound modified conductive silver paste and a preparation method thereof, wherein the environment-friendly compound modified conductive silver paste comprises 75-85 parts of compound silver powder, 8-15 parts of high-performance lead-free glass powder, 15-25 parts of an organic carrier, 1-5 parts of a silver paste auxiliary agent and 0.5 part of methyl cellulose.
Preferably, the compound silver powder is micron silver powder containing 5% of superfine silver oxide by mass.
Preferably, the high-performance lead-free glass powder comprises the following inorganic components in percentage by mass: 360-80% of Bi2O, 210-20% of SiO, 24-8% of TiO and 56-12% of ZrO.
Preferably, the organic carrier consists of the following components in percentage by mass: 70-80% of organic solvent, 13-16% of urea grease, 6-9% of polyvinyl acetate and 1-5% of castor oil.
Preferably, the organic solvent is a mixed solvent of terpineol, tributyl citrate and butyl carbitol acetate, and the mass ratio of the terpineol to the tributyl citrate to the butyl carbitol acetate is 7: 2: 1
The preparation method of the environment-friendly compound modified conductive silver paste comprises the following steps:
step one, preparing compound silver powder and an organic carrier respectively;
step two, fully and uniformly mixing Bi2O3, SiO2, TiO2 and ZrO5, smelting at the temperature of 1100-1250 ℃ for 30-50 min, pouring the molten glass into water for quenching, and carrying out secondary grinding on the quenched glass block to obtain high-performance lead-free glass powder with the particle size of 1-4 microns;
step three, mixing the compound silver powder and the organic carrier 3/5, heating and stirring the mixture uniformly at 70-110 ℃, dispersing the mixture by a grinder to obtain silver powder slurry, mixing the high-performance lead-free glass powder and the organic carrier 2/5, heating and stirring the mixture uniformly at 70-110 ℃, and dispersing the mixture by the grinder to obtain glass slurry;
step four, further mixing and grinding the silver powder slurry and the glass slurry uniformly to obtain the environment-friendly conductive silver slurry, wherein the particle size of the environment-friendly conductive silver slurry is 2.0-8.0 mu m, the viscosity is 250-290 Pa.s, and the thixotropic index is 5.0-7.0;
and step five, adding 5% of methyl cellulose into the conductive silver paste, and then fully mixing, wherein the mixed conductive silver paste has excellent toughness, flexibility and transparency after being cured.
Compared with the prior art, the invention has the following beneficial effects: by adding 5% of methyl cellulose into the conductive silver paste and then fully mixing, the mixed conductive silver paste has excellent toughness, flexibility and transparency after being cured, so that the cured gel is softer and more stable, and the cured gel can sufficiently protect the parts.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An environment-friendly compound modified conductive silver paste and a preparation method thereof, wherein the environment-friendly compound modified conductive silver paste comprises 75-85 parts of compound silver powder, 8-15 parts of high-performance lead-free glass powder, 15-25 parts of an organic carrier, 1-5 parts of a silver paste auxiliary agent and 0.5 part of methyl cellulose.
The compound silver powder is micron silver powder containing 5% of superfine silver oxide by mass.
The high-performance lead-free glass powder comprises the following inorganic components in percentage by mass: 360-80% of Bi2O, 210-20% of SiO, 24-8% of TiO and 56-12% of ZrO.
The organic carrier consists of the following components in percentage by mass: 70-80% of organic solvent, 13-16% of urea grease, 6-9% of polyvinyl acetate and 1-5% of castor oil.
The organic solvent is a mixed solvent of terpineol, tributyl citrate and butyl carbitol acetate, and the mass ratio of the terpineol to the tributyl citrate to the butyl carbitol acetate is 7: 2: 1.
the preparation method of the environment-friendly compound modified conductive silver paste comprises the following steps:
step one, preparing compound silver powder and an organic carrier respectively;
step two, fully and uniformly mixing Bi2O3, SiO2, TiO2 and ZrO5, smelting at the temperature of 1100-1250 ℃ for 30-50 min, pouring the molten glass into water for quenching, and carrying out secondary grinding on the quenched glass block to obtain high-performance lead-free glass powder with the particle size of 1-4 microns;
step three, mixing the compound silver powder and the 3/5 organic carrier, heating and stirring the mixture evenly at 70-110 ℃, then dispersing the mixture by a grinder to obtain silver powder slurry, mixing the high-performance lead-free glass powder and the 2/5 organic carrier, heating and stirring the mixture evenly at 70-110 ℃, and then dispersing the mixture by the grinder to obtain glass slurry;
step four, further mixing and grinding the silver powder slurry and the glass slurry uniformly to obtain the environment-friendly conductive silver slurry, wherein the particle size of the environment-friendly conductive silver slurry is 2.0-8.0 mu m, the viscosity is 250-290 Pa.s, and the thixotropic index is 5.0-7.0;
and step five, adding 5% of methyl cellulose into the conductive silver paste, and then fully mixing, wherein the mixed conductive silver paste has excellent toughness, flexibility and transparency after being cured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The environment-friendly compound modified conductive silver paste is characterized by comprising 75-85 parts of compound silver powder, 8-15 parts of high-performance lead-free glass powder, 15-25 parts of organic carrier, 1-5 parts of silver paste auxiliary agent and 0.5 part of methyl cellulose.
2. The environment-friendly compound modified conductive silver paste according to claim 1, which is characterized in that: the compound silver powder is micron silver powder containing 5% of superfine silver oxide by mass.
3. The environment-friendly compound modified conductive silver paste according to claim 1, which is characterized in that: the high-performance lead-free glass powder comprises the following inorganic components in percentage by mass: 360-80% of Bi2O, 210-20% of SiO, 24-8% of TiO and 56-12% of ZrO.
4. The environment-friendly compound modified conductive silver paste according to claim 1, which is characterized in that: the organic carrier consists of the following components in percentage by mass: 70-80% of organic solvent, 13-16% of urea grease, 6-9% of polyvinyl acetate and 1-5% of castor oil.
5. The environment-friendly compound modified conductive silver paste according to claim 4, which is characterized in that: the organic solvent is a mixed solvent of terpineol, tributyl citrate and butyl carbitol acetate, and the mass ratio of the terpineol to the tributyl citrate to the butyl carbitol acetate is 7: 2: 1.
6. the preparation method of the environment-friendly compound modified conductive silver paste as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
step one, preparing compound silver powder and an organic carrier respectively;
step two, fully and uniformly mixing Bi2O3, SiO2, TiO2 and ZrO5, smelting at the temperature of 1100-1250 ℃ for 30-50 min, pouring the molten glass into water for quenching, and carrying out secondary grinding on the quenched glass block to obtain high-performance lead-free glass powder with the particle size of 1-4 microns;
step three, mixing the compound silver powder and the 3/5 organic carrier, heating and stirring the mixture evenly at 70-110 ℃, then dispersing the mixture by a grinder to obtain silver powder slurry, mixing the high-performance lead-free glass powder and the 2/5 organic carrier, heating and stirring the mixture evenly at 70-110 ℃, and then dispersing the mixture by the grinder to obtain glass slurry;
step four, further mixing and grinding the silver powder slurry and the glass slurry uniformly to obtain the environment-friendly conductive silver slurry, wherein the particle size of the environment-friendly conductive silver slurry is 2.0-8.0 mu m, the viscosity is 250-290 Pa.s, and the thixotropic index is 5.0-7.0;
and step five, adding 5% of methyl cellulose into the conductive silver paste, and then fully mixing, wherein the mixed conductive silver paste has excellent toughness, flexibility and transparency after being cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210167489.6A CN114446510A (en) | 2022-02-23 | 2022-02-23 | Environment-friendly compound modified conductive silver paste and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210167489.6A CN114446510A (en) | 2022-02-23 | 2022-02-23 | Environment-friendly compound modified conductive silver paste and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599349A (en) * | 2009-04-14 | 2009-12-09 | 贵阳晶华电子材料有限公司 | Silver paste of inner electrode for chip inductor and preparation method thereof |
| CN108806823A (en) * | 2018-06-14 | 2018-11-13 | 扬州鑫晶光伏科技有限公司 | Environment-friendlyconductive conductive silver paste material and preparation method thereof and crystal silicon solar batteries prepared therefrom |
| US20200388714A1 (en) * | 2018-03-30 | 2020-12-10 | Soltrium Advanced Materials Technology, Ltd. Suzhou | Front-side conductive paste for crystalline silicon solar cell, preparation method therefor, and solar cell |
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2022
- 2022-02-23 CN CN202210167489.6A patent/CN114446510A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599349A (en) * | 2009-04-14 | 2009-12-09 | 贵阳晶华电子材料有限公司 | Silver paste of inner electrode for chip inductor and preparation method thereof |
| US20200388714A1 (en) * | 2018-03-30 | 2020-12-10 | Soltrium Advanced Materials Technology, Ltd. Suzhou | Front-side conductive paste for crystalline silicon solar cell, preparation method therefor, and solar cell |
| CN108806823A (en) * | 2018-06-14 | 2018-11-13 | 扬州鑫晶光伏科技有限公司 | Environment-friendlyconductive conductive silver paste material and preparation method thereof and crystal silicon solar batteries prepared therefrom |
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