What are the commonly used thermal conductive materials for LED lighting?
The design challenges encountered in high-power LED lighting solutions are heat dissipation design and overheat protection. The power and thermal management system required by the LED light source, because compared with other light sources, most of the electrical energy provided to the LED is converted into heat. Without proper thermal management, this kind of heat will affect the LED life and color output. Solving the heat dissipation problem of LED lighting is an indispensable link in the design of the lighting.
The thermal conductive materials commonly used in LED lighting fixtures are mainly divided into structural thermal conductive materials and filling thermal conductive materials according to their role in the lamps.
In addition to the function of the structural heat-conducting material as the housing of the lamp, it also serves as the heat dissipation of the LED light source, such as heat-conducting plastic. The filling thermal conductive material is mainly used between the heating element and the heat sink, as the connection between the two, because the thermal interface material has low thermal conductivity relative to the heating element and the metal heat sink, so the choice of thermal conductive material is also very good. Crucially, this determines the speed of heat transfer.
The following are several thermal interface materials used in high-power LED solutions:
Thermal conductive silicone grease: It has excellent thermal conductivity, electrical insulation, stability, high and low temperature resistance, etc. It is a commonly used thermal conductive material for high-power LED lighting fixtures;
Thermally conductive silicone sheet: fill the air gap between the heating element and the heat sink or metal base to achieve the heat transfer between the heating part and the heat dissipation part, and also play the role of insulation and shock absorption, which can meet the requirements of miniaturization and ultra-thin Design requirements and ease of use are unmatched by thermal grease;
Thermally conductive double-sided adhesive: Bonding between the heating fin and the heat sink is simple and convenient to use, which is good for improving production efficiency.
Adhesive sealant: a room temperature curing one-component silicone adhesive sealant, non-corrosive to most metals; has excellent resistance to cold and heat alternating performance, aging resistance and electrical insulation properties, excellent moisture resistance, Anti-vibration, anti-corona and anti-leakage performance.
At present, thermal conductive materials such as thermal grease, thermally conductive silicone sheet, thermally conductive double-sided adhesive, adhesive sealant, etc. have been widely used in LED lighting solutions.
Thermal solutions for every industry is very important as the power is gradually higher and higher, Sinda Thermal can provide varieties heatsinks and coolers which inlcuding aluminum extruded heatsink, high performance heatsink, copper heatsink, skived fin heatsink, and heat pipe heatsink. please contact us if you have any questions about thermal solution.
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