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Low cost recyclable conductive paste and preparation method thereof

A conductive paste, low-cost technology, applied to conductive layers on insulating carriers, cable/conductor manufacturing, circuits, etc., can solve problems such as environmental pollution, high cost of high-performance conductive pastes, and low safety in use. Solve the effect of high price, fast film forming speed and low cost

Active Publication Date: 2018-01-12
BEIJING DREAM INK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unsatisfactory electrical conductivity of existing low-cost conductive pastes in this field, the high cost of high-performance conductive pastes, and the unavoidable environmental pollution and low safety of use due to the use of solvents in existing conductive pastes , There are fire and explosion hazards, and the defects that cannot be recycled and reused, the present invention aims to provide a recyclable, highly conductive conductive paste;

Method used

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  • Low cost recyclable conductive paste and preparation method thereof
  • Low cost recyclable conductive paste and preparation method thereof
  • Low cost recyclable conductive paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The formula composition of the low-cost recyclable high-conductivity paste of this embodiment is shown in the following table:

[0033]

[0034] The preparation method of this conductive paste is:

[0035] Step 1: smelting of the liquid metal conductive adhesive, the liquid metal raw materials (elemental gallium, elemental indium) are respectively subjected to reduction treatment in a reduction furnace under the protection of hydrogen to remove oxides on the surface of the raw materials. Proportional sampling and weighing of the two raw materials after reduction treatment are put together into a vacuum melting furnace or an atmosphere furnace for melting. The smelted alloy liquid is poured into ingots or filled into containers in a vacuum furnace or an atmosphere furnace for later use.

[0036] Step 2: Weigh the above-mentioned liquid metal conductive adhesive according to the proportion, add it into a container protected by an inert gas, heat until it is 10°C to 20...

Embodiment 2

[0039] The formula composition of a low-cost recyclable high-conductivity paste is shown in the following table:

[0040]

[0041] In the preparation step 2, the smelted liquid metal conductive adhesive is weighed according to the proportion, added into a container protected by an inert gas, and heated until it is 10°C to 200°C above its melting point (heating temperature is 230°C). The grinding time is 3.5h (the amount of conductive enhancing material is large, and the particle size is slightly larger, so it needs to be grinded for about 0.5h). Other operations are the same as in Example 1.

Embodiment 3

[0043] The formula composition of a low-cost recyclable high-conductivity paste is shown in the following table:

[0044]

[0045] The dispersing and wetting agent in the table is BYK-190, a non-ionic polymer dispersing agent.

[0046]In this embodiment, silver powder is used as the conductive enhancing material. Silver powder has the characteristics of good conductivity and strong oxidation resistance. The contact resistance between the interfaces of the conductive paths formed together is small. In addition, the silver powder used in the present invention has the characteristics of high sphericity and uniform particle size distribution, so it is easy to disperse evenly, significantly reducing the amount of non-conductive dispersing wetting agent and coupling agent; The conductivity of alkene is relatively good, and the material of this embodiment has better conductivity.

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Abstract

The invention provides a low cost recyclable conductive paste. By weight percentage, 45-80% liquid metal conductive binder, 12-50% conductive reinforced material, 1-5% dispersant wetting agent, 0.5-2%coupling agent and 0.5-2% clunging promoter are comprised, wherein the liquid metal is a low melting point metal or alloy with a melting point below 300 DEG C or conductive nano-fluids formed throughmixing low melting point metal nano particles with fluid dispersant. The low cost recyclable conductive paste is advantaged in that the liquid metal conductive binder is utilized to replace a non-conductive high-molecular binder and solvent, under the synergism effect of small amount of coupling agent and the dispersant wetting agent, through adding small amount of the conductive reinforced filling material to realize uniform and stable dispersion, the low cost conductive paste with high compatibility and high dispersion stability is formed, and volume resistivity reaches 3*10<-5> Omega*cm.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a recyclable conductive paste and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of electronic information technology, electronic equipment is constantly moving towards the direction of miniaturization, intelligence, environmental protection and low cost, which prompts people to continuously research, develop and apply more advanced and economical electronic component manufacturing technology. At the same time, in the field of new energy, with the increasing demand of the solar photovoltaic industry and the improvement of the requirements for photoelectric conversion efficiency, high-performance conductive paste is one of the key materials to realize the large-scale use of photovoltaic solar energy. As a basic electronic material with specific functions, conductive paste is widely used in printed circuit boar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B13/00H01B5/14
CPCH01B1/02H01B5/14H01B13/00
Inventor 董仕晋白安洋汪鸿章李亿东于洋刘静
Owner BEIJING DREAM INK TECH CO LTD
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