Preparation of intermediate-temperature graphene/silver composite conductive slurry and application thereof

A composite conductive and graphene technology, which can be used in equipment for manufacturing conductive/semiconducting layers, conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, etc., and can solve problems such as stable separation and dispersion. , to achieve the effect of reducing the dosage, low sintering temperature, and solving the bonding problem

Inactive Publication Date: 2018-07-20
林荣铨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

New carbon-based conductive fillers, including carbon nanotubes (CNTs) and graphene, have excellent conductivity due to large π bonds, but there are problems with stable separation and dispersion in applications

Method used

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  • Preparation of intermediate-temperature graphene/silver composite conductive slurry and application thereof
  • Preparation of intermediate-temperature graphene/silver composite conductive slurry and application thereof
  • Preparation of intermediate-temperature graphene/silver composite conductive slurry and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of medium temperature graphene / silver composite conductive paste, comprises the following steps:

[0036] (1) Dissolve 0.5wt.% tributyl phosphate and 0.5wt.% ethyl cellulose in terpineol by magnetic stirring at 50°C;

[0037] (2) At 50°C, by magnetic stirring, add 0.5wt.% silane coupling agent, 0.5wt.% simethicone oil, 0.5wt.% dibutyl phthalate in proportion, stirring time Be 10h, obtain the organic carrier phase of this conductive paste;

[0038] (3) Weighing the organic carrier phase and placing it in a vacuum stirred tank, under a stirring condition of 100r / min, adding nano-silver powder and low-melting-point glass powder mixed uniformly in batches to obtain a mixed slurry of nano-silver; adding nano-silver powder, The ratio of the organic carrier phase to the glass powder is 30:20:2;

[0039] (4) under the stirring condition of 120r / min, take by weighing dry, activated graphene powder and place in the nano-silver mixed slurry that abov...

Embodiment 2

[0045] A kind of preparation method of medium temperature graphene / silver composite conductive paste, comprises the following steps:

[0046] (1) Dissolve 9wt.% tributyl phosphate and 9wt.% ethyl cellulose in terpineol by magnetic stirring at 100°C;

[0047] (2) Under the condition of 100 ℃, by magnetic stirring, add 4wt.% silane coupling agent, 6wt.% ethylene glycol dibutyl ether, 4wt.% dibutyl phthalate successively according to the proportion, and the stirring time is 0h, obtain the organic vehicle phase of the conductive paste;

[0048] (3) Weighing the organic carrier phase and placing it in a vacuum stirred tank, under the stirring condition of 800r / min, adding nano-silver powder and low-melting-point glass powder mixed uniformly in batches to obtain a mixed slurry of nano-silver; adding nano-silver powder, The ratio of the organic carrier phase to the glass powder is 80:75:15;

[0049] (4) under the stirring condition of 800r / min, take by weighing dry, activated graph...

Embodiment 3

[0055] A kind of preparation method of medium temperature graphene / silver composite conductive paste, comprises the following steps:

[0056] (1) Dissolve 1wt.% tributyl phosphate and 1wt.% ethyl cellulose in terpineol by magnetic stirring at 60°C;

[0057] (2) Under the condition of 60°C, by magnetic stirring, 1wt.% silane coupling agent, 1wt.% simethicone oil, 1wt.% dibutyl phthalate were added sequentially according to the proportion, and the stirring time was 12h to obtain the organic vehicle phase of the conductive paste;

[0058] (3) Take a certain amount of organic carrier phase and place it in a vacuum stirred tank. Under the condition of stirring at a low speed of 200r / min, then add uniformly mixed nano-silver powder (provided by Aladdin Reagent Co., Ltd.) and low melting point powder in batches. Glass powder, the ratio of adding nano-silver powder, organic vehicle and glass powder is 35:25:5;

[0059] (4) Under the condition of stirring at a low speed of 200r / min, ...

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Abstract

The graphene has high chemical stability, high electrical conductivity and high mechanical flexibility. However, after the graphene is dispersed in a conductive slurry, bridge connection type contactbetween layers of the graphene can not be formed easily and thus a perfect conductive path can not be formed easily; and a large contact resistance exists at the layer connection part, so that the surface resistance of the conductive coating can not be reduced easily. According to the invention, graphene prepared by a liquid phase ultrasonic stripping method and nano silver powder are used as conductive fillers and low-temperature glass powder is used as a binder; the graphene, the low-temperature glass powder, and other organic solvents and additives are fixed to prepare a graphene/silver composite conductive slurry having the high-temperature bonding property; the conductive slurry is coated on the surface of a ceramic sheet; and after sintering for a period of time at a high temperature, a graphene/silver composite conductive coating having the excellent bonding force and excellent electrical conductivity is formed on the surface of the ceramic sheet.

Description

technical field [0001] The invention relates to a conductive coating, in particular to a medium-temperature graphene / silver composite conductive paste and a method for preparing the graphene / silver composite conductive coating on the surface of a ceramic substrate. Background technique [0002] Electrically conductive paste is an electronic functional material integrating materials, metallurgy, chemical industry, and electronic technology. It is the basis of hybrid integrated circuits, sensitive components, surface mount technology, resistor networks, displays, and various electronic discrete devices. Material. With the rapid development of the information industry, the devices are developing in the direction of miniaturization, precision and flexibility. Many scientific research institutions at home and abroad have a strong interest in the development and application of conductive paste. [0003] Conductive paste usually includes three components: functional phase, organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/24H01B1/16H01B1/18H01B5/14H01B13/00
CPCH01B1/22H01B1/16H01B1/18H01B1/24H01B5/14H01B13/00H01B13/0026
Inventor 林荣铨
Owner 林荣铨
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