Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of copper alloy for high-power LED (light emitting diode) phase-transition internal/external heat dissipators

A high-power, phase-change technology, used in lighting and heating equipment, semiconductor devices of light-emitting elements, cooling/heating devices for lighting devices, etc.

Inactive Publication Date: 2011-10-26
SHANDONG UNIV
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the built-in copper heat dissipation pads used in high-power LEDs, the copper clad layer in the printed circuit board (PCB), and the external aluminum heat sink can only play a role in conduction heat dissipation and radiation heat dissipation, but in controlling temperature rise. None of them have the function of phase change endothermic suppression of temperature rise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A kind of preparation method of copper alloy for high-power LED phase change type internal and external heat sink, comprises the following steps:

[0024] The first step is to determine the maximum allowable temperature of high-power LED;

[0025] In the second step, according to the maximum temperature allowed by high-power LEDs, the phase transition temperature range of the copper-based alloy determined is: 35°C-100°C;

[0026] The third step is based on the phase transition temperature determined in the second step, and then determines the weight percentage of alloying elements according to the formula Ms (°C)=2112-56.5*(wt%Zn)-153.7*(wt%X);

[0027] The fourth step is to smelt the sample according to the determined composition ratio;

[0028] The fifth step is to keep the smelted sample at 840°C for 30 minutes, and then keep it in boiling water at 100°C for 30 minutes;

[0029] The sixth step is to use a differential thermal analyzer to test whether ...

Embodiment 2

[0036] Embodiment 2: A kind of preparation method of high-power LED phase change type copper alloy for internal and external heat sink, comprises the following steps:

[0037] The first step is to determine the maximum allowable temperature of high-power LED;

[0038] In the second step, according to the maximum allowable temperature of high-power LEDs, the phase transition temperature range of copper-based alloys determined is: 40°C;

[0039] The third step is based on the phase transition temperature determined in the second step, and then determines the weight percentage of alloying elements according to the formula Ms (°C)=2112-56.5*(wt%Zn)-153.7*(wt%X);

[0040] The fourth step is to smelt the sample according to the determined composition ratio;

[0041] The fifth step is to keep the smelted sample at 835°C for 28 minutes, and then keep it in boiling water at 100°C for 28 minutes;

[0042] The sixth step is to test and verify whether the phase transition point is consi...

Embodiment 3

[0049] Embodiment 3: A kind of preparation method of copper alloy for high-power LED phase change type internal and external heat sink, comprises the following steps:

[0050] The first step is to determine the maximum allowable temperature of high-power LED;

[0051] In the second step, according to the maximum temperature allowed by the high-power LED, the phase transition temperature range of the copper-based alloy is determined as: 50°C;

[0052] The third step is based on the phase transition temperature determined in the second step, and then determines the weight percentage of alloying elements according to the formula Ms (°C)=2112-56.5*(wt%Zn)-153.7*(wt%X);

[0053] The fourth step is to smelt the sample according to the determined composition ratio;

[0054] The fifth step is to keep the smelted sample at 845°C for 32 minutes, and then keep it in boiling water at 100°C for 32 minutes;

[0055] The sixth step is to use a differential thermal analyzer to test whether ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of copper alloy for high-power LED (light emitting diode) phase-transition internal / external heat dissipators, which comprises the following steps: (1) determining the maximum allowable temperature of high-power LED; (2) determining the phase transition temperature range of the copper-base alloy; (3) determining the percents of the alloy elements; (4) carrying out sample size melting; (5) carrying out heat treatment on the molten sample; (6) testing to verify whether the transition transition point conforms to the designed value; (7) adjusting the composition; (8) producing and melting; (9) casting; and (10) carrying out homogenizing treatment. The high-power LED heat dissipator made of the copper-base alloy material not only has the copper clad layer in the original built-in copper heat-dissipation pad and printed circuit board (PCB) as well as the conductive heat dissipation and radiation heat dissipation in the external aluminum heat dissipator, but also has the function of phase-transition heat absorption below junction temperature. Every gram of alloy can absorb 7-9 joule more of heat quantity. Besides, the manufacturing cost of the copper alloy is lower than that of pure copper. Therefore, the invention has a high development and application value in manufacturing high-power LED heat dissipators.

Description

technical field [0001] The invention relates to a preparation method of a copper-based alloy for a phase-change internal and external radiator, in particular to a preparation method for a copper alloy for a high-power LED phase-transition internal and external radiator. Background technique [0002] The photoelectric conversion efficiency of the LED is only 15% to 20%, and the remaining 80% to 85% is converted into heat. If the heat cannot be discharged in time, it will seriously affect the luminous efficiency and luminous life of the LED. It is a high power LED. At present, the built-in copper heat dissipation pads used in high-power LEDs, the copper clad layer in the printed circuit board (PCB), and the external aluminum heat sink can only play a role in conduction heat dissipation and radiation heat dissipation, but in controlling temperature rise. None of them have the function of phase transition endothermic suppression of temperature rise. Contents of the invention ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C1/02C22C9/00C22F1/08F21V29/00F21Y101/02F21V29/503F21V29/89F21Y115/10
Inventor 耿贵立
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com