CN104073696A - High-stability aluminum-base composite heat radiating material for LED - Google Patents

Abstract

The invention relates to a lamp heat radiating material, in particular to a high-stability aluminum-base composite heat radiating material for an LED and a production method thereof. The heat radiating material is produced through the following raw materials in parts by weight: 70 to 72 parts of aluminum, 14 to 16 parts of aluminium nitride, 4 to 6 parts of cryolite powder, 15 to 18 parts of cellulose, 0.4 to 0.6 part of titanium sulfate, 3 to 5 parts of sodium fluosilicate, 8 to 10 parts of graphite, 1 to 2 parts of ferrous chloride, 0.5 to 0.6 part of citric acid, 2 to 5 parts of mineral oil, 2 to 3 parts of potassium alum, 6 to 8 parts of sodium silicate and 4 to 5 parts of auxiliaries. The heat radiating material integrates the advantages of the components such as aluminum, aluminum nitride, cellulose and auxiliaries and has a good heat conduction property and a good insulation property; after being processed by citric acid dilute solution in an immersing manner, the surface properties of the cellulose and the titanium sulfate are improved; all raw materials are ground in the mixed dilute solution of potassium alum and sodium silicate, so that the sintering effect of the heat radiating material is good, the sintering time is shortened, the surface of a finished product is unlikely to fracture, the stability is good, the heat conduction coefficient is high, the LED lamp can be effectively protected, and the service life of the lamp can be greatly prolonged.

Description

High stability 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 stability 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 stability aluminum-base composite heat sink material for a kind of LED is provided, to improve the use properties of material, improve the use properties of LED light fixture, to achieve these goals, the technical solution used in the present invention is as follows:

High stability 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: aluminium 70-72, aluminium nitride 14-16, cryolite powder 4-6, Mierocrystalline cellulose 15-18, titanium sulfate 0.4-0.6, Sodium Silicofluoride 3-5, graphite 8-10, iron protochloride 1-2, citric acid 0.5-0.6, mineral oil 2-5, alum 2-3, water glass 6-8, 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 stability aluminum-base composite heat sink material for described a kind of LED, its manufacture craft comprises following steps:

(1) first citric acid is dissolved in appropriate water, making its concentration is 5-8%, adds subsequently iron protochloride in solution, after stirring and dissolving, then adds Mierocrystalline cellulose, titanium sulfate, soaks after 5-8h, filters, is washed to neutral rear being dried, and gained material is standby;

(2) alum, water glass are devoted in the water of 10 times of its total weight parts, after being stirred to it and dissolving completely, add step (1) gained material and other remaining component, after dispersed with stirring 1-2h, drop into ball-milling processing in ball mill, make 10000-hole sieve surplus≤0.05% of gained material;

(3) material of step (2) 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, to naturally cool to room temperature after the temperature sintering 4-6h of 650-700 ℃, obtain.

The invention has the advantages that: compared with conventional aluminum heat exchanging material, on raw material, combine aluminium, aluminium nitride, Mierocrystalline cellulose, graphite, cryolite powder, the advantage of the compositions such as auxiliary agent, have good heat conduction and insulating property concurrently, in technique, first utilize citric acid dilute solution immersion treatment Mierocrystalline cellulose and titanium sulfate, improve its surface property, and by all raw materials at alum, milled processed in the mixing dilute solution of water glass, make stock yard ball milling more abundant, easy-formation more, shorten sintering time, the heat sink material compact structure that the present invention prepares, surface is not easy to crack, good stability, thermal conductivity is high, quality is light, durable in use, 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: aluminium 72, aluminium nitride 16, cryolite powder 6, Mierocrystalline cellulose 15, titanium sulfate 0.4, Sodium Silicofluoride 5, graphite 10, iron protochloride 1, citric acid 0.5, mineral oil 4, alum 2, water glass 8, 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 stability aluminum-base composite heat sink material for described a kind of LED, its manufacture craft comprises following steps:

(1) first citric acid is dissolved in appropriate water, making its concentration is 8%, adds subsequently iron protochloride in solution, after stirring and dissolving, then adds Mierocrystalline cellulose, titanium sulfate, soaks after 8h, filters, is washed to neutral rear being dried, and gained material is standby;

(2) alum, water glass are devoted in the water of 10 times of its total weight parts, after being stirred to it and dissolving completely, add step (1) gained material and other remaining component, after dispersed with stirring 2h, drop into ball-milling processing in ball mill, make 10000-hole sieve surplus≤0.05% of gained material;

(3) material of step (2) 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, to naturally cool to room temperature after the temperature sintering 4h of 650-700 ℃, obtain.

The more conventional LED of the prepared heat sink material of the present embodiment reduces by 12.5% by the density of the more conventional aluminium base heat sink material of heat sink material, thermal conductivity improves 27.8%, thermal diffusivity improves 29.2%, heat balance time shorten in average 158min, and light fixture improves 30.4% work-ing life.

Claims (2)

1. high stability 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: aluminium 70-72, aluminium nitride 14-16, cryolite powder 4-6, Mierocrystalline cellulose 15-18, titanium sulfate 0.4-0.6, Sodium Silicofluoride 3-5, graphite 8-10, iron protochloride 1-2, citric acid 0.5-0.6, mineral oil 2-5, alum 2-3, water glass 6-8, 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 stability aluminum-base composite heat sink material for a kind of LED as claimed in claim 1, its production method is as follows:

(1) first citric acid is dissolved in appropriate water, making its concentration is 5-8%, adds subsequently iron protochloride in solution, after stirring and dissolving, then adds Mierocrystalline cellulose, titanium sulfate, soaks after 5-8h, filters, is washed to neutral rear being dried, and gained material is standby;

(2) alum, water glass are devoted in the water of 10 times of its total weight parts, after being stirred to it and dissolving completely, add step (1) gained material and other remaining component, after dispersed with stirring 1-2h, drop into ball-milling processing in ball mill, make 10000-hole sieve surplus≤0.05% of gained material;

(3) material of step (2) 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, to naturally cool to room temperature after the temperature sintering 4-6h of 650-700 ℃, obtain.