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Graphite heat-dissipation coating and preparation method thereof

A technology of heat-dissipating paint and graphite, applied in coating and other directions, can solve the problems of reduced heat-dissipating performance and life, high price of copper, insufficiency of corrosion, etc., and achieve the effect of reducing thermal efficiency, improving production efficiency, improving precision and service life

Active Publication Date: 2013-10-23
湖南奥德迈能源有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gold and silver have better heat dissipation performance, but the disadvantage is that the price is too high, and the heat dissipation coefficient of copper (398W / m. Once copper is oxidized, its heat dissipation performance and life will be greatly reduced

Method used

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  • Graphite heat-dissipation coating and preparation method thereof
  • Graphite heat-dissipation coating and preparation method thereof
  • Graphite heat-dissipation coating and preparation method thereof

Examples

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Embodiment 1

[0021] Taking the conventional product of preparing the graphite heat-dissipating coating of the present invention as an example, choose graphite with a particle size of 0.00001 to 0.5 millimeters, mechanically grind, then microwave baking, and use microwave continuous baking for 20 minutes under the condition of 850-1000 degrees. hour; prepare mixed glue, respectively take polyvinylidene fluoride, sodium carboxymethyl cellulose, pentaerythritol, water by weight ratio 1:1.5:2:1, mix by mechanical high-speed stirring; then according to mass percentage more than 80% graphite , 5%-10% of the mixed glue and the rest of the water are processed by precision machinery such as grinding to form the graphite heat-dissipating coating of the present invention.

Embodiment 2

[0023] Taking the high-end product of the graphite heat-dissipating coating of the present invention as an example, select graphite with a particle size of 50 to 900 nanometers, mechanically grind it, then bake it with microwaves, and bake it continuously for 30 minutes under the condition of 850-1000 degrees. Hours; prepare mixed glue, take polyvinylidene fluoride, sodium carboxymethyl cellulose, pentaerythritol, water respectively by weight ratio 2:2:0.5:1, mix by mechanical high-speed stirring; then according to the mass percentage of more than 80% graphite , 5%-10% of the mixed glue and the rest of the water are processed by precision machinery such as grinding to form the graphite heat-dissipating coating of the present invention.

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Abstract

The invention belongs to the field of heat-dissipation products, and provides a graphite heat-dissipation coating and a preparation method thereof. The graphite heat-dissipation coating is a liquid mixture comprising by mass, more than 80% of graphite, 5%-10% of mixed glue and the balance water, and the liquid mixture is prepared through grinding and other precision machinery deep processing. The mixed glue is prepared from a plurality of water-soluble glue through mechanical high-speed stirring and mixing. The mixed glue mainly comprises the following components: by mass, 1-5 parts of polyvinylidene fluoride, 1-3 parts of carboxymethylcellulose sodium, 4-0.5 parts of pentaerythritol and 0.3-1 parts of water. The graphite heat-dissipation coating has the advantages of good heat-dissipation effect and light quality. Coating layers can be molded at will, and thickness of the coating layers can be adjusted according to need. The production technology of the graphite heat-dissipation coating is simple, and the production cost of the graphite heat-dissipation coating is only 1 / 3 of the production cost of foreign products of the same level, so that as far as performance is concerned, imported products can completely be replaced by the graphite heat-dissipation coating.

Description

technical field [0001] The invention belongs to the field of heat dissipation products, in particular to a graphite heat dissipation coating and a preparation method thereof. Background technique [0002] High-power density electronic devices and high-end electronic industrial devices are gradually developing towards miniaturization, compact structure, and high power density. The enhanced export and dissipation of heat generated in the process puts forward higher requirements. At present, most products, such as civil high-end electronic devices, chip materials for LEDs, heat exchangers for industrial devices, etc., almost use aluminum alloy as the base material of the heat sink, but aluminum is not the highest heat dissipation coefficient (237W / m.K). metallic material. Gold and silver have better heat dissipation performance, but the disadvantage is that the price is too high, and the heat dissipation coefficient of copper (398W / m. Once copper is oxidized, its heat dissip...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12
Inventor 刘新利刘沈澍陈榕
Owner 湖南奥德迈能源有限责任公司