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Ceramic membrane cooling coating for LED radiator and preparation method of ceramic membrane cooling coating

A technology for LED heat sinks and heat-dissipating coatings, applied in coatings and other directions, can solve the problems of exacerbating the light decay of light sources, hindering thermal radiation, and bulky quality, and achieve the effects of enhancing radiation, increasing service life, and increasing irradiance

Inactive Publication Date: 2013-02-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the current low electro-optical conversion efficiency of LEDs, a large amount of heat is generated. If the heat is not removed in time, it will aggravate the light decay of the light source and affect the service life of LEDs.
[0003] In the existing LED heat dissipation technology, designers usually increase the heat dissipation area of ​​the heat sink or improve the structure of the heat sink to achieve the purpose of heat dissipation, and seldom consider enhancing heat transfer by enhancing radiation heat transfer. Therefore, high-power LED heat dissipation Devices are often bulky and heavy, which increases the cost of generation, unsafe factors and aesthetic problems in use.
Existing radiators usually adopt the method of anodic oxidation to achieve the purpose of isolating the air from being corroded, and at the same time make it present various colors for aesthetic purposes, but on the other hand, this layer of oxide film hinders Heat radiation, thus affecting its use effect and life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of liquid A: Add 40g of silica sol, 15g of copper chrome black, 20g of zirconia, 20g of silicon carbide, and 5g of fumed silica into a sealable container A, and then add 150g of grinding glass beads. The particle size of the glass beads used is 0.4-1mm, after sealing, disperse with HAK-3370 rapid disperser for 2 hours, filter out glass beads and prepare liquid A for later use; zirconia and silicon carbide are commercially available nano-scale products with a particle size of 30-50nm. The fumed silica is a commercially available 3000-mesh fumed silica product. Silica sol is a neutral silica sol with a dispersed particle size of 10-15 nanometers produced by Jiangyin Saiwei Technology and Trade Co., Ltd., with a pH value of 4.5-8, a solid content of 20-30%, and Na 2 O content is less than 0.2%.

[0032] (2) Preparation of liquid B: Add 41.25g of methyltrimethoxysilane, 22.5g of dimethyldiethoxysilane, 11.25g of phenyltriethoxysilane, 10g of formic acid, 3g...

Embodiment 2

[0038] (1) Preparation of liquid A: Add 50g of silica sol, 20g of titanium dioxide, 15.4g of zirconia, 6.6g of silicon carbide, and 8g of organic bentonite into a sealable container A, and then add 180g of grinding glass beads. After sealing, use a rapid disperser to Disperse for 2.5 hours, filter out the glass beads and set aside; the zirconia-based silicon carbide used is a commercially available nanoscale product with a particle size range of 30-50 nanometers. Silica sol is a neutral silica sol product produced by Jiangyin Saiwei Technology and Trade Co., Ltd. The neutral silica sol with a dispersed particle size of 10-15 nanometers has a pH value of 4.5-8 and a solid content of 20-30 %, Na 2 O content is less than 0.2%. Organic bentonite is a commercially available Hemings SD-1 model product.

[0039] (2) Preparation of liquid B: Add 48g methyltrimethoxysilane, 20g dimethyldiethoxysilane, 12g phenyltriethoxysilane, 8g formic acid, 6g ethanol, 6g methanol into container B...

Embodiment 3

[0045] (1) Preparation of liquid A: Add 60g of silica sol, 15g of iron chromium brown, 12g of zirconia, 8g of silicon carbide, 3g of fumed silica, and 2g of organic bentonite into plastic container A, then add 180g of grinding glass beads, and seal it. Disperse with a rapid disperser for 2 hours, filter out the glass beads and set aside; the zirconia-based silicon carbide used is a commercially available nanoscale product with a particle size range of 30-50 nanometers. The fumed silica is a commercially available 3000-mesh fumed silica product. Organic bentonite is a commercially available Hemings SD-1 model product.

[0046] Silica sol is a neutral silica sol with a dispersed particle size of 10-15 nanometers produced by Jiangyin Saiwei Technology and Trade Co., Ltd., with a pH value of 4.5-8, a solid content of 20-30%, and Na 2 The O content is less than 0.2%.

[0047] (2) Preparation of liquid B: Add 46.4g of methyltrimethoxysilane, 20.8g of dimethyldiethoxysilane, 12.8g of...

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Abstract

The invention discloses a ceramic membrane cooling coating for an LED radiator and a preparation method of the ceramic membrane cooling coating. The coating comprises a liquid A and a liquid B at the weight ratio of (2:1)-(2.5:1), wherein the liquid A comprises the following materials by weight percent: 40-60 percent of silica sol, 20-40 percent of filling material, 15-20 percent of pigment, 5-10 percent of anti-anti-settling agent; and the liquid B comprises the following materials by weight percent:75-80 percent of organo siloxane, 8-10 percent of catalyst and 10-15 percent of solvent. According to the utility model, the functional coating is coated outside the LED radiator, and a high-radiance filling material is adopted. Compared with a general decorative coating, the ceramic membrane cooling coating has an excellent cooling function, provides radiative heat transfer under the condition of no forced convection and improves the problem that the radiating effect is bad in absence of forced convection. Besides, the coating has an excellent decorative function, and the radiance reaches 0.83-0.92 after a membrane is formed.

Description

technical field [0001] The invention relates to a coating, in particular to a functional ceramic film heat dissipation coating and a preparation method thereof. The coating is mainly used on LED radiators. Background technique [0002] LED (Light Emitting Diode) has been rapidly developed due to its high luminous efficiency and low power consumption. LED lighting technology has the advantages of high light efficiency, energy saving and environmental protection, and long service life. It has been widely used in indoor lighting, traffic lighting, display, decoration and other fields. Due to the current low electro-optic conversion efficiency of LEDs, a large amount of heat is generated. If the heat is not removed in time, it will aggravate the light decay of the light source and affect the service life of LEDs. [0003] In the existing LED heat dissipation technology, designers usually increase the heat dissipation area of ​​the heat sink or improve the structure of the heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12
Inventor 李静姚泽民刘业明
Owner SOUTH CHINA UNIV OF TECH
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