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Graphene nano-silver electronic paste

A technology of electronic paste and nano-silver, which is applied in the field of electronic information, can solve the problems of increasing the filling density of metal wires, the inability to guarantee the adhesion of the substrate, and restricting the development of touch screen technology, so as to eliminate the copper-silver boundary and achieve significant economic and social benefits. , the effect of easy industrial production

Inactive Publication Date: 2017-12-05
郴州国盛新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the large-scale promotion of touch screens, the conductive silver paste used for touch screens is also increasing at an alarming rate every year. However, most of the silver pastes for touch screens in the prior art are prepared by using metallic silver powder as conductive metal powder. Silver ions are prone to migration, which will cause Bypasses are formed between conductors without electrical connections, resulting in insulation degradation or even short circuits. It is difficult to increase the filling density of metal wires by itself, and its electrical conductivity is restricted during low-temperature sintering. Moreover, the line width of conductive paste used for touch screen circuits is getting smaller and smaller. The thinner the line, the greater the resistance and square resistance, and even poor bonding, disconnection, and unguaranteed adhesion to the substrate. These problems seriously restrict the development of touch screen technology.

Method used

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  • Graphene nano-silver electronic paste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1. Add 0.2mg / ml graphene, 0.6mg / ml nano-silver, 10mg / ml hexadecyltrimethylammonium bromide, and 10mg / ml KH550 silane coupling agent to N,N-dimethylformamide , heated to 50°C for heat preservation, and ultrasonically treated for 2 hours to obtain a graphene nano-silver dispersion;

[0038] S2. Add 5 parts of epoxy resin to 25 parts of N,N-dimethylformamide, heat to 60°C to dissolve, add 5 parts of graphene nano-silver dispersion, 30 parts of metal conductive powder (60 parts of silver powder, 40 parts of copper powder), 0.3 parts of the mixture of nano-nickel powder and nano-calcium carbonate, stirred at high speed at constant temperature, rolled three times on a three-roll rolling mill, and filtered through a 400-mesh sieve.

Embodiment 2

[0040] S1. Add 0.5mg / ml graphene, 0.8mg / ml nano-silver, 20mg / ml hexadecyltrimethylammonium bromide, and 20mg / ml silane coupling agent into N,N-dimethylformamide , heated to 55° C. for heat preservation, and ultrasonically treated for 2 hours to obtain a graphene nano-silver dispersion;

[0041] S2. Add 7 parts of epoxy resin to 30 parts of N,N-dimethylformamide, heat to 65°C to dissolve, add 5 parts of graphene nano-silver dispersion, 40 parts of metal conductive powder (60 parts of silver powder, 40 parts of copper powder), 0.5 parts of the mixture of nano-nickel powder and nano-calcium carbonate, stirred at high speed at constant temperature, rolled 4 times in a three-roll mill, and filtered through a 400-mesh sieve.

Embodiment 3

[0043] S1. Add 0.8mg / ml graphene, 2.8mg / ml nano-silver, 79mg / ml hexadecyltrimethylammonium bromide, and 29mg / ml silane coupling agent into N,N-dimethylformamide , heated to 60°C for heat preservation, and ultrasonically treated for 2 hours to obtain a graphene nano-silver dispersion;

[0044] S2. Add 8 parts of epoxy resin to 38 parts of N,N-dimethylformamide, heat to 70°C and heat-preserve to dissolve, add 7 parts of graphene nano-silver dispersion, 45 parts of metal conductive powder (71 parts of silver powder, 29 parts of copper powder), 1 part of the mixture of nano-nickel powder and nano-calcium carbonate, stirred at high speed at constant temperature, rolled 4 times in a three-roll rolling mill, and filtered through a 400-mesh sieve.

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Abstract

The invention discloses graphene nano-silver electronic paste. The graphene nano-silver electronic paste includes the following components by mass: 30-70 parts of metal conductive powder, 4-10 parts of graphene nano-silver dispersion liquid, 18-50 parts of organic solvent, 5-15 parts of resin and 0.1-3.0 parts of additive. The excellent conductivity, mechanical property and thermal property of graphene enhance flexibility of the paste on an ITO film and effectively improve the comprehensive performance of the paste. A preparation method of the paste is easy to operate, industrial production of the paste can be easily conducted, and substantial economic benefits and social benefits are provided. The electronic paste exhibits good bendability after being printed and exhibits high adaptability, so the paste can be widely applied to the field of touch screens and flexible display screens.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a graphene nano-silver electronic paste. Background technique [0002] With the increasing number of multimedia information query devices, people are talking more and more about touch screens. Users only need to touch the icons or text on the computer display screen with their fingers to realize the operation of the host computer, thus making human-computer interaction more convenient. Straightforward, this technology greatly facilitates users who do not understand computer operations. [0003] It has only been a few years since touch screens appeared in the Chinese market. According to statistics, the shipments of touch screens from 2011 to 2012 were 900 million pieces and 1.35 billion pieces respectively, a year-on-year increase of 60% and 40%. In particular, the growth rate of large-size touch screens is much higher than the overall growth rate. From 2013 to 20...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B1/24G06F3/044B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00G06F3/044H01B1/22H01B1/24
Inventor 李丽萍
Owner 郴州国盛新材科技有限公司
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