Graphite conductive powder especially for improving conductivity of cable and preparation method

A technology of conductive powder and graphene, which is applied in the direction of cable/conductor manufacturing, circuit, electrical components, etc., can solve the problems of high cost, complex process, difficult to disperse graphene, etc., achieve simple use process, convenient use, and realize conductive performance Effect

Active Publication Date: 2017-09-19
CHANGSHA HANHE CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, this method overcomes the shortcomings of adding graphene to the cable core material, which is difficult to disperse, complicated process and high cost.

Method used

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  • Graphite conductive powder especially for improving conductivity of cable and preparation method

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Comparison scheme
Effect test

Embodiment 1

[0027] A graphene conductive powder specially used for improving the conductivity of cables and a preparation method thereof. The specific process of preparing graphene conductive powder and spraying on the surface of the cable core to form a conductive layer is as follows:

[0028] First, mix 200 g of tin powder and 250 g of anhydrous silver acetate to form an alloy for use. Disperse 20 g of graphene into 10 L of absolute ethanol and vibrate ultrasonically for 1 h to obtain a graphene dispersion. Add the above tin-silver alloy to the graphene dispersion, encapsulate the ball mill, and ball mill for 15 hours at a speed of 400r / min; place the above ball milled mixture in a mixer, add 20g of polyurethane, and heat to 75℃ and keep Constant temperature, while mechanical stirring at a speed of 80r / min. After the water content of the slurry is reduced to 40%, it is transferred to a vacuum oven for thorough drying; the dried composite powder is heated to the silver acetate decomposition...

Embodiment 2

[0031] First, 180g of tin powder and 200g of anhydrous silver acetate are mixed to form an alloy for use. Disperse 30 g of graphene into 10 L of absolute ethanol, and vibrate ultrasonically for 1.5 hours to obtain a graphene dispersion. Add the above tin-silver alloy to the graphene dispersion, encapsulate the ball mill, and ball mill for 10 hours at a speed of 600r / min; place the above ball milled mixture in a mixer, add 25g polyvinyl alcohol, and heat to 70°C And maintain a constant temperature, while mechanically stirring at a speed of 75r / min, after the water content of the slurry is reduced to 35%, transfer to a vacuum oven for thorough drying; heat the dried composite powder to the decomposition temperature of silver acetate, and keep it at a constant temperature 12min. The composite powder was then placed in a tube furnace, treated at 700°C in an argon atmosphere for 37 minutes, and a laser beam was applied at the same time. The graphene was completely uniformly welded ...

Embodiment 3

[0034] First, 200g of tin powder and 200g of anhydrous silver acetate are mixed to form an alloy for use. Disperse 40 g of graphene into 10 L of absolute ethanol, and vibrate ultrasonically for 1.3 hours to obtain a graphene dispersion. Add the above tin-silver alloy to the graphene dispersion, encapsulate the ball mill, and ball mill for 12h at a speed of 500r / min; place the above ball milled mixture in a mixer, add 30g of polyurethane, and heat to 80℃ and keep it Constant temperature, while mechanical stirring at a speed of 70r / min, after the water content of the slurry is reduced to 30%, it is transferred to a vacuum oven for thorough drying; the dried composite powder is heated to the silver acetate decomposition temperature and kept at a constant temperature for 18 minutes. The composite powder was then placed in a tube furnace, treated at 800°C in an argon atmosphere for 32 minutes, and a laser beam was applied at the same time. The graphene was completely uniformly welde...

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Abstract

The invention belongs to the technical field of improving of conductivity of cable materials and provides a graphite conductive powder especially for improving conductivity of a cable and a preparation method. By mixing and carrying out ball grinding on the graphite and tin-silver alloy, adding graphite dispersing liquid, carrying out ball milling and drying, adding adhesion agent for drying, carrying out carrying out dispersing adhesion on the graphite and the sin-silver alloy in advance, and carrying out laser welding, forming uniformly dispersed and firmly adhered conductive powder. Through welding loading of the graphite and the tin-silver alloy, dense and uniform conductive layers can be formed on the surface of a cable core of the cable through arc spraying by use of the graphite, and conductivity of the graphite is well developed. Compared with a method where the graphite is directly added into the core materials of the cable, the provided conductive powder is quite easy to use and the use technique is simple. By directly carrying out arc spraying on the conductive powder on the surface of a cable with a copper core or an aluminum core, the conductive layers are formed, so the conductivity of the cable can be greatly improved.

Description

Technical field [0001] The present invention relates to the field of improving the electrical conductivity of cables, in particular to a graphene conductive powder specially used for improving electrical conductivity of cables and a preparation method. Background technique [0002] The wire and cable industry is the second largest industry in China after the automobile industry, with a product variety satisfaction rate and a domestic market share of over 90%. Worldwide, China's total wire and cable output value has surpassed the United States, becoming the world's largest wire and cable producer. With the rapid development of China's wire and cable industry, the number of new companies has continued to rise, and the overall technical level of the industry has been greatly improved. The sustained and rapid growth of China's economy has provided huge market space for cable products. The strong temptation of the Chinese market has made the world focus on the Chinese market. In just...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B1/04H01B13/00
CPCH01B1/02H01B1/04H01B13/00
Inventor 陈庆王镭迪曾军堂
Owner CHANGSHA HANHE CABLE
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