CN104195376A - LED aluminum-base composite heat dissipation material containing modified powdered pumice - Google Patents

Abstract

The invention relates to lamp heat dissipation materials, in particular to an LED aluminum-base composite heat dissipation material containing modified powdered pumice and a production method of the material. The heat dissipation material comprises, by weight, five to eight parts of zirconium silicate, seven to nine parts of silicon carbide, 70 to 72 parts of aluminum, three to five parts of pentaerythritol, 13 parts to 15 parts of aluminum nitride, 10 parts to 12 parts of magnesium, five parts to eight parts of copper nanoparticles, eight parts to ten parts of the powdered pumice, seven parts to eight parts of aluminum oxide, three parts to five parts of silicone oil, six parts to eight parts of potassium titanate whisker, two parts to four parts of etidronic acid and four parts to five parts of auxiliaries. According to the heat dissipation material, advantages of the aluminum, the magnesium, the zirconium silicate, the silicon carbide and other components are integrated, the good heat conduction and insulation performance can be both considered, the modified powdered pumice formed by mixing of etidronic acid dilute solutions, the silicone oil and the pentaerythritol and the potassium titanate whisker are more compatible with other metal powder, heat conductivity coefficients are improved, the heat dissipation material is compact in structure, light, safe and durable in use, an LEDF chip can be effectively protected due to the rapid heat dissipation capability, and the service life of a lamp is prolonged.

Description

Aluminum-base composite heat sink material containing modification pumice sand for a kind of LED

Technical field

The present invention relates to light fixture heat sink material, be specifically related to aluminum-base composite heat sink material and production method thereof containing modification pumice sand 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, the aluminum-base composite heat sink material containing modification pumice sand for a kind of LED is provided, to improve the heat dispersion of material, extend the work-ing life of light fixture, to achieve these goals, the technical solution used in the present invention is as follows:

Aluminum-base composite heat sink material containing modification pumice sand 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: zirconium silicate 5-8, silicon carbide 7-9, aluminium 70-72, tetramethylolmethane 3-5, aluminium nitride 13-15, magnesium 10-12, copper nanoparticle 5-8, pumice sand 8-10, aluminum oxide 7-8, silicone oil 3-5, potassium titanate crystal whisker 6-8, hydroxy ethylene diphosphonic acid 2-4, auxiliary agent 4-5.

Described auxiliary agent is made by the raw material of following weight part: butyl stearate 4-5, fluorite fine powder 15-18, zirconium acetate 4-5, oxyacetic acid 1-2, iron powder 5-8, potassium fluoroaluminate 6-8, preparation method is: first oxyacetic acid is dissolved in appropriate water, be mixed with the aqueous solution that concentration is 4-5%, and fluorite fine powder is dropped in solution, dispersed with stirring is filtered after evenly soaking 10-12h, be washed to neutral rear dry, gained material mixes with other remaining component, and be heated to 40-50 ℃, after constant temperature dispersed with stirring 2-3h, be cooled to room temperature, again material is ground to form to 400-500 order fine powder, obtain.

The described aluminum-base composite heat sink material containing modification pumice sand for a kind of LED, its manufacture craft comprises following steps:

(1) first hydroxy ethylene diphosphonic acid is dissolved in appropriate water, be mixed with the dilute solution that concentration is 5-8%, subsequently pumice sand, potassium titanate crystal whisker are dropped in solution, after soaking 5-8h, filter, be washed to neutral rear cryodrying, and by gained powder and tetramethylolmethane, silicone oil mixed grinding 1-2h, gained material is standby;

(2) step (1) gained material and other remaining component are uniformly mixed after 2-3h, 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 sent into compression moulding in mould, 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, magnesium, zirconium silicate, the advantage of the compositions such as silicon carbide, have good heat conduction and insulating property concurrently, and utilize the mixing dilute solution of hydroxy ethylene diphosphonic acid to carry out immersion treatment to pumice sand and potassium titanate crystal whisker, powder after processing is at silicone oil, mixed grinding in tetramethylolmethane, more easily compatible between the powder obtaining and other metal-powder, its thermal conductivity also improves, auxiliary agent can improve the sintering character of mixing material, shorten sintering time, the heat sink material compact structure that the present invention prepares, light weight safety, durable in use, heat-sinking capability can effectively be protected LED chip fast, extended the work-ing life of light fixture.

Embodiment

Embodiment

The present embodiment LED heat sink material is made by following weight part raw material: zirconium silicate 8, silicon carbide 9, aluminium 72, tetramethylolmethane 5, aluminium nitride 15, magnesium 10, copper nanoparticle 8, pumice sand 10, aluminum oxide 7, silicone oil 5, potassium titanate crystal whisker 8, hydroxy ethylene diphosphonic acid 3, auxiliary agent 5.

Described auxiliary agent is made by the raw material of following weight part: butyl stearate 5, fluorite fine powder 18, zirconium acetate 5, oxyacetic acid 2, iron powder 8, potassium fluoroaluminate 6, preparation method is: first oxyacetic acid is dissolved in appropriate water, be mixed with concentration and be 5% the aqueous solution, and fluorite fine powder is dropped in solution, dispersed with stirring is filtered after evenly soaking 12h, be washed to neutral rear dry, gained material mixes with other remaining component, and be heated to 40-50 ℃, after constant temperature dispersed with stirring 3h, be cooled to room temperature, again material is ground to form to 500 order fine powders, obtain.

The described aluminum-base composite heat sink material containing modification pumice sand for a kind of LED, its manufacture craft comprises following steps:

(1) first hydroxy ethylene diphosphonic acid is dissolved in appropriate water, be mixed with concentration and be 8% dilute solution, subsequently pumice sand, potassium titanate crystal whisker are dropped in solution, after soaking 8h, filter, be washed to neutral rear cryodrying, and by gained powder and tetramethylolmethane, silicone oil mixed grinding 2h, gained material is standby;

(2) step (1) gained material and other remaining component are uniformly mixed after 3h, 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 sent into compression moulding in mould, 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 23.2% with the thermal conductivity of the more conventional aluminium base heat sink material of heat sink material, and thermal diffusivity improves 26.2%, heat balance time shorten in average 153min, and light fixture improves 26.7% work-ing life.

Claims (2)

1. the aluminum-base composite heat sink material containing modification pumice sand for a LED, it is characterized in that, this heat radiation is made by the raw material of following weight part: zirconium silicate 5-8, silicon carbide 7-9, aluminium 70-72, tetramethylolmethane 3-5, aluminium nitride 13-15, magnesium 10-12, copper nanoparticle 5-8, pumice sand 8-10, aluminum oxide 7-8, silicone oil 3-5, potassium titanate crystal whisker 6-8, hydroxy ethylene diphosphonic acid 2-4, auxiliary agent 4-5;

Described auxiliary agent is made by the raw material of following weight part: butyl stearate 4-5, fluorite fine powder 15-18, zirconium acetate 4-5, oxyacetic acid 1-2, iron powder 5-8, potassium fluoroaluminate 6-8, preparation method is: first oxyacetic acid is dissolved in appropriate water, be mixed with the aqueous solution that concentration is 4-5%, and fluorite fine powder is dropped in solution, dispersed with stirring is filtered after evenly soaking 10-12h, be washed to neutral rear dry, gained material mixes with other remaining component, and be heated to 40-50 ℃, after constant temperature dispersed with stirring 2-3h, be cooled to room temperature, again material is ground to form to 400-500 order fine powder, obtain.

2. a kind of LED use as claimed in claim 1 is containing the aluminum-base composite heat sink material of modification pumice sand, and its production method is as follows:

(1) first hydroxy ethylene diphosphonic acid is dissolved in appropriate water, be mixed with the dilute solution that concentration is 5-8%, subsequently pumice sand, potassium titanate crystal whisker are dropped in solution, after soaking 5-8h, filter, be washed to neutral rear cryodrying, and by gained powder and tetramethylolmethane, silicone oil mixed grinding 1-2h, gained material is standby;

(2) step (1) gained material and other remaining component are uniformly mixed after 2-3h, 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 sent into compression moulding in mould, under nitrogen atmosphere with after the temperature sintering 4-6h of 650-700 ℃, through naturally cooling to room temperature and get final product.