CN104087793A - High heat-transfer aluminum based composite heat sink material for LED - Google Patents

Abstract

The invention relates to a lamp heat sink material and specifically relates to a high heat-transfer aluminum based composite heat sink material for an LED (Light Emitting Diode) and a production method of the material. The heat sink material is prepared from the following raw materials in parts by weight: 4-6 parts of graphite, 12-16 parts of boron nitride, 10-12 parts of aluminum nitride, 80-85 parts of aluminum powder, 5-8 parts of aluminum oxide, 1-2 parts of kyanite powder, 1-3 parts of copper sulfate, 2-3 parts of ferrous sulfate,1-3 parts of silver phosphate, 1-2 parts of potassium pyrophosphate, 2-4 parts of white granulated sugar and 4-5 parts of auxiliaries. The heat sink material has the comprehensive advantages of the components such as aluminum, boron nitride, aluminum nitride, graphite and auxiliaries, and also has excellent heat conduction and insulation properties; all the materials are ground in the mixed aqueous solution of ferrous sulfate, potassium pyrophosphate and white granulated sugar so that the raw materials are mutually ball-milled more thoroughly and the sintering property of the material is improved; the heat sink material is compact in structure, smooth in surface, waterproof and moisture-proof, high in heat conduction coefficient, quick in heat transfer, and still capable of keeping excellent heat dissipation efficiency even after being used for a longtime; and as a result, an LED lamp can be effectively protected and the service life of the lamp can be greatly increased.

Description

High heat transfer aluminum-base composite heat sink material for a kind of LED

Technical field

The present invention relates to light fixture heat sink material, be specifically related to high heat transfer aluminum-base composite heat sink material and production method thereof for a kind of LED.

Background technology

LED be called as the 4th generation light source, there is the advantages such as energy-saving and environmental protection, safety, less energy-consumption, high brightness, be widely used in daily life, the heat dispersion of LED lamp body itself is most important, directly has influence on work-ing life and the illuminating effect of light fixture.Existing LED heat sink material is mainly to be made by metallic substance such as aluminium, copper, there is in actual use the shortcomings such as cost restriction, insulating property be inadequate, so formula of necessary improvement material, make material reach more good radiating effect, the use properties of improving light fixture, increases the service life.

Summary of the invention

The object of the invention is to, high heat transfer aluminum-base composite heat sink material for a kind of LED is provided, to improve the heat dispersion of material, extend the work-ing life of LED light fixture, to achieve these goals, the technical solution used in the present invention is as follows:

High heat transfer aluminum-base composite heat sink material for a kind of LED, it is characterized in that, material of the present invention is made by the raw material of following weight part: graphite 4-6, boron nitride 12-16, aluminium nitride 10-12, aluminium powder 80-85, aluminium sesquioxide 5-8, aquamaine stone flour 1-2, copper sulfate 1-3, ferrous sulfate 2-3, Trisilver phosphate 1-3, potassium pyrophosphate 1-2, white sugar 2-4, auxiliary agent 4-5.

Described auxiliary agent is made by the raw material of following weight part: polyaluminium sulfate 4-5, animal bone 8-10, sodium sand 1-3, polyimide 4-5, silver-coated copper powder 8-10, magnesium oxide 12-14, Magnesium Carbonate Light 41-45 5-8, preparation method is: first that animal bone is cooling standby after 800-900 ℃ of temperature lower calcination 10-12h, again polyaluminium sulfate is dissolved in and in suitable quantity of water, is mixed with the aqueous solution that concentration is 4-6%, and the animal bone after calcining and other remaining component are dropped in solution, concentrate drying after mix and blend dispersion 2-3h, grind to form 300-400 order fine powder, obtain.

High heat transfer aluminum-base composite heat sink material for described a kind of LED, its manufacture craft comprises following steps:

(1) first ferrous sulfate, potassium pyrophosphate, white sugar are dropped into 10 times in the water of its total weight parts, dissolve completely after, add again other remaining component, mix and blend disperses after 1-2h, and material drops into ball-milling processing in ball mill, makes 10000-hole sieve surplus≤0.05% of gained material;

(2) material of step (1) gained is dry at 80-100 ℃, keep water ratio≤0.02% of material, by after powder grinding distribution 40-50min, send into compression moulding in mould subsequently, under nitrogen atmosphere with after the temperature sintering 4-6h of 650-700 ℃, through naturally cooling to room temperature and get final product.

The invention has the advantages that: compared with conventional aluminum heat exchanging material, on raw material, combine aluminium, boron nitride, aluminium nitride, graphite, the advantage of the compositions such as auxiliary agent, have good heat conduction and insulating property concurrently, and by all materials at ferrous sulfate, potassium pyrophosphate, milled processed in the mixed aqueous solution of white sugar, make stock yard ball milling more abundant, stock yard is more easily compatible, improve the sintering character of material, the heat sink material compact structure that the present invention prepares, any surface finish, waterproof and dampproof, thermal conductivity is high, conduct heat fast, long-time use still can keep good radiating efficiency, can effectively protect LED light fixture, greatly extend the work-ing life of light fixture.

Embodiment

Embodiment

The present embodiment LED heat sink material is made by following weight part raw material: graphite 5, boron nitride 14, aluminium nitride 12, aluminium powder 85, aluminium sesquioxide 8, aquamaine stone flour 2, copper sulfate 2, ferrous sulfate 3, Trisilver phosphate 2, potassium pyrophosphate 2, white sugar 4, auxiliary agent 5.

Described auxiliary agent is made by the raw material of following weight part: polyaluminium sulfate 5, animal bone 10, sodium sand 3, polyimide 5, silver-coated copper powder 10, magnesium oxide 14, Magnesium Carbonate Light 41-45 5, preparation method is: first that animal bone is cooling standby after 800-900 ℃ of temperature lower calcination 12h, again polyaluminium sulfate is dissolved in in suitable quantity of water, to be mixed with concentration be 6% the aqueous solution, and the animal bone after calcining and other remaining component are dropped in solution, concentrate drying after mix and blend dispersion 3h, grind to form 400 order fine powders, obtain.

High heat transfer aluminum-base composite heat sink material for described a kind of LED, its manufacture craft comprises following steps:

(1) first ferrous sulfate, potassium pyrophosphate, white sugar are dropped into 10 times in the water of its total weight parts, dissolve completely after, add again other remaining component, mix and blend disperses after 2h, and material drops into ball-milling processing in ball mill, makes 10000-hole sieve surplus≤0.05% of gained material;

(2) material of step (1) gained is dry at 80-100 ℃, keep water ratio≤0.02% of material, by after powder grinding distribution 50min, send into compression moulding in mould subsequently, under nitrogen atmosphere with after the temperature sintering 6h of 650-700 ℃, through naturally cooling to room temperature and get final product.

The more conventional LED of the prepared heat sink material of the present embodiment improves 26.5% with the thermal conductivity of the more conventional aluminium base heat sink material of heat sink material, and thermal diffusivity improves 27.9%, heat balance time shorten in average 147min, and light fixture improves 28.7% work-ing life.

Claims (2)

1. high heat transfer aluminum-base composite heat sink material for a LED, it is characterized in that, this heat radiation is made by the raw material of following weight part: graphite 4-6, boron nitride 12-16, aluminium nitride 10-12, aluminium powder 80-85, aluminium sesquioxide 5-8, aquamaine stone flour 1-2, copper sulfate 1-3, ferrous sulfate 2-3, Trisilver phosphate 1-3, potassium pyrophosphate 1-2, white sugar 2-4, auxiliary agent 4-5;

Described auxiliary agent is made by the raw material of following weight part: polyaluminium sulfate 4-5, animal bone 8-10, sodium sand 1-3, polyimide 4-5, silver-coated copper powder 8-10, magnesium oxide 12-14, Magnesium Carbonate Light 41-45 5-8, preparation method is: first that animal bone is cooling standby after 800-900 ℃ of temperature lower calcination 10-12h, again polyaluminium sulfate is dissolved in and in suitable quantity of water, is mixed with the aqueous solution that concentration is 4-6%, and the animal bone after calcining and other remaining component are dropped in solution, concentrate drying after mix and blend dispersion 2-3h, grind to form 300-400 order fine powder, obtain.

2. high heat transfer aluminum-base composite heat sink material for a kind of LED as claimed in claim 1, its production method is as follows:

(1) first ferrous sulfate, potassium pyrophosphate, white sugar are dropped into 10 times in the water of its total weight parts, dissolve completely after, add again other remaining component, mix and blend disperses after 1-2h, and material drops into ball-milling processing in ball mill, makes 10000-hole sieve surplus≤0.05% of gained material;

(2) material of step (1) gained is dry at 80-100 ℃, keep water ratio≤0.02% of material, by after powder grinding distribution 40-50min, send into compression moulding in mould subsequently, under nitrogen atmosphere with after the temperature sintering 4-6h of 650-700 ℃, through naturally cooling to room temperature and get final product.