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High-temperature sintered conductive silver paste and preparation method thereof

A technology of conductive silver paste and high temperature sintering, which is used in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. Problems such as the adhesion of the silver film to the substrate, to achieve the effect of enhancing capacitance, enhancing conductivity, and increasing connection

Inactive Publication Date: 2019-03-12
刘紫嫣 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductivity, conductivity stability and capacitance of the electrode are affected by many factors, especially the volatile characteristics of the organic carrier and the sintering temperature; the volatile characteristics of the organic carrier determine the quality of the film layer, and the volatility of the organic carrier is determined by It is determined by the volatilization characteristics of the solvent; the higher the sintering temperature, the lower the viscosity of the glass liquid, the better the fluidity, the better the effect of infiltrating the silver powder and the matrix and driving the rearrangement of the silver powder, but too high a sintering temperature or too long a holding time will make The glass phase is unevenly distributed and concentrated between the silver layer and the substrate, which affects the conductivity of the silver film and the adhesion between the silver film and the substrate

Method used

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  • High-temperature sintered conductive silver paste and preparation method thereof
  • High-temperature sintered conductive silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 68 parts of spherical or flake silver powder with a particle size of 0.1-5 microns, 10 parts of lead-free low-temperature molten glass powder, 8 parts of ethyl cellulose, and 10 parts of organic solvent, of which

[0023] Lead-free low-temperature molten glass powder is composed of the following components: Bi 2 o 3 35%, B 2 o 3 20%, ZnO 10%, SiO 2 22%, Al 2 o 3 2%, CaO 6%, V 2 o 5 5%, choose lead-free low-temperature molten glass powder with a particle size of 4 μm and a softening temperature of 650°C;

[0024] Organic solvents include 6 parts of terpineol, 2.5 parts of butyl carbitol, and 1.5 parts of butyl carbitol acetate;

[0025] S1. Mix organic solvents: 6 parts of terpineol, 2.5 parts of butyl carbitol, and 1.5 parts of butyl carbitol acetate to obtain a mixed organic solvent;

[0026] S2, fully mixing ethyl cellulose with a mixed organic solvent to form a viscous liquid;

[0027] S3. Mixing treatment: fully stir and mix the viscous liquid obtai...

Embodiment 2

[0031] Take 65 parts of spherical or flake silver powder with a particle size of 0.1-5 microns, 6 parts of lead-free low-temperature molten glass powder, 5 parts of ethyl cellulose, and 5 parts of organic solvent, of which

[0032] Lead-free low-temperature molten glass powder is composed of the following components: Bi 2 o 3 35%, B 2 o 3 20%, ZnO 10%, SiO 2 22%, Al 2 o 3 2%, CaO 6%, V 2 o 5 5%, the particle size of lead-free low-temperature molten glass powder is selected as 3 μm, and the softening temperature is 390 ° C;

[0033] Organic solvents include 2.75 parts of terpineol, 1.5 parts of butyl carbitol, and 0.75 parts of butyl carbitol acetate;

[0034] S1. Mix organic solvents: 2.75 parts of terpineol, 1.5 parts of butyl carbitol, and 0.75 parts of butyl carbitol acetate to obtain a mixed organic solvent;

[0035] S2, fully mixing ethyl cellulose with a mixed organic solvent to form a viscous liquid;

[0036] S3. Mixing treatment: fully stir and mix the visc...

Embodiment 3

[0039] Take 70 parts of spherical or flake silver powder with a particle size of 0.1-5 microns, 12 parts of lead-free low-temperature molten glass powder, 10 parts of ethyl cellulose, and 15 parts of organic solvent, of which

[0040] Lead-free low-temperature molten glass powder is composed of the following components: Bi 2 o 3 35%, B 2 o 3 20%, ZnO 10%, SiO 2 22%, Al 2 o 3 2%, CaO 6%, V 2 o 5 5%, choose lead-free low-temperature molten glass powder with a particle size of 5 μm and a softening temperature of 780°C;

[0041] Organic solvents include 9.75 parts of terpineol, 3 parts of butyl carbitol, and 2 parts of butyl carbitol acetate;

[0042] S1. Mix organic solvents: 9.75 parts of terpineol, 3 parts of butyl carbitol, and 2 parts of butyl carbitol acetate to obtain a mixed organic solvent;

[0043] S2, fully mixing ethyl cellulose with a mixed organic solvent to form a viscous liquid;

[0044] S3. Mixing treatment: fully stir and mix the viscous liquid obtained...

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Abstract

The invention discloses a high-temperature sintered conductive silver paste, which consists of the following components in parts by weight: 65 to 70 parts of silver powder, 6 to 12 parts of lead-freelow temperature melted glass dust, 0.5 to 1 part of organic carrier and 5 to 15 parts of organic solvent. According to the invention, the high-temperature sintered conductive silver paste is obtainedby mixing, constant temperature water bath, high speed dispersion, grinding and other processes. The high-temperature sintered conductive silver paste and the preparation method thereof provided by the invention are beneficial to the rearrangement of silver powder, the enhancement of conductivity, the adhesion of conductive silver paste and the enhancement of the capacitance and the service life of conductive silver paste, and when the high-temperature sintered conductive silver paste is used as an electrode, the capacitance performance can be improved and the capacitance can be maintained.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a high-temperature sintered conductive silver paste and a preparation method thereof. Background technique [0002] Solar power generation is an important means of large-scale and economical use of solar energy, and is the focus of the country's development of a low-carbon economy. Therefore, research on solar cells has received widespread attention from all over the world. As an important part of solar cells, the front electrode has a decisive impact on the light-receiving area and series resistance of solar cells, and is one of the important factors affecting the conversion efficiency of solar cells. At present, the metallization of the front electrode of crystalline silicon solar cells in the industry generally adopts the screen printing thick film silver paste process due to cost considerations: the conductive silver paste is painted on the silicon wafer by screen printing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00
Inventor 刘紫嫣徐文忠
Owner 刘紫嫣
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