What materials are used for heatsink extruded?
As a supplier of heatsink extruded products, I've had the privilege of working with a diverse range of materials over the years. Each material brings its unique set of properties to the table, making it suitable for different applications. In this blog, I'll explore the common materials used for heatsink extrusion and their characteristics.
Aluminum
Aluminum is by far the most widely used material for heatsink extrusion. It offers a perfect balance of thermal conductivity, weight, and cost - effectiveness.
Thermal Conductivity: Aluminum has a relatively high thermal conductivity, typically around 200 - 237 W/(m·K). This means it can efficiently transfer heat away from the heat source, such as a microprocessor or an LED. For example, in a LED Housing, aluminum heatsinks can quickly dissipate the heat generated by the LEDs, ensuring their long - term stability and performance.
Lightweight: One of the significant advantages of aluminum is its low density. It is much lighter than other metals like copper, which makes it ideal for applications where weight is a concern, such as in portable electronics. Lighter heatsinks also reduce the overall weight of the device, making it more user - friendly and easier to handle.
Cost - Effective: Aluminum is abundant and relatively inexpensive compared to other high - performance materials. This cost - effectiveness allows manufacturers to produce heatsinks at a lower cost without sacrificing too much on performance. As a result, aluminum extruded heatsinks are widely used in a variety of industries, from consumer electronics to automotive.
Extrudability: Aluminum has excellent extrudability. It can be easily shaped into complex profiles during the extrusion process, which is crucial for designing heatsinks with different fin geometries. These fin geometries, such as straight fins, pin fins, or wavy fins, can significantly increase the surface area of the heatsink, enhancing its heat dissipation capacity. For instance, Extruded Heatsink products made from aluminum can be customized to meet the specific requirements of different applications.
Copper
Copper is another material commonly used in heatsink extrusion, especially in applications where high - performance heat dissipation is required.
Thermal Conductivity: Copper has an extremely high thermal conductivity, around 385 - 401 W/(m·K), which is almost twice that of aluminum. This makes it an excellent choice for applications where large amounts of heat need to be dissipated quickly, such as in high - end computer processors or power electronics.
Density and Weight: However, copper is much denser than aluminum, which means copper heatsinks are heavier. This can be a drawback in applications where weight is a critical factor. For example, in aerospace or portable devices, the added weight of a copper heatsink may not be acceptable.
Cost: Copper is also more expensive than aluminum. The higher cost can limit its use in mass - produced, cost - sensitive applications. But for high - end products where performance is paramount, the additional cost of copper may be justified.
Extrudability: Although copper can be extruded, it is more difficult to work with compared to aluminum. Copper has a higher melting point and is less malleable, which requires more specialized extrusion equipment and processes.
Aluminum Alloys
In addition to pure aluminum, various aluminum alloys are also used for heatsink extrusion. These alloys are designed to enhance specific properties of aluminum.
6061 Aluminum Alloy: This is one of the most commonly used aluminum alloys for heatsink extrusion. It has good mechanical properties, corrosion resistance, and moderate thermal conductivity. The addition of magnesium and silicon in the alloy improves its strength and formability. 6061 aluminum alloy is suitable for a wide range of applications, from general - purpose heatsinks to those used in automotive and industrial equipment.
6063 Aluminum Alloy: 6063 alloy is known for its excellent surface finish and extrudability. It has a slightly lower strength than 6061 but offers better aesthetic appeal. This alloy is often used in applications where the appearance of the heatsink is important, such as in consumer electronics.
Other Materials
There are also some other materials that are used in specific applications for heatsink extrusion.
Aluminum Vapor Chamber: Aluminum Vapor Chamber is a relatively new technology in heatsink design. It combines the high - thermal - conductivity properties of a vapor chamber with the lightweight and cost - effective nature of aluminum. A vapor chamber contains a small amount of working fluid that evaporates at the heat source, absorbs heat, and then condenses at the cooler end, releasing the heat. This phase - change process allows for very efficient heat transfer, making it suitable for high - power applications.
Graphite: Graphite has high in - plane thermal conductivity and is lightweight. It is often used in thin, flat heatsink applications, such as in laptops or mobile devices. Graphite heatsinks can be easily integrated into the device's design due to their flexibility and thin profile.
When choosing the material for a heatsink, several factors need to be considered. The thermal requirements of the application, including the amount of heat to be dissipated and the temperature limits, are the most important. The weight and cost constraints also play a significant role. Additionally, the mechanical properties, such as strength and corrosion resistance, may be crucial depending on the environment in which the heatsink will operate.
As a heatsink extruded supplier, we have the expertise and capabilities to work with different materials and produce high - quality heatsinks to meet your specific needs. Whether you need a simple aluminum heatsink for a consumer product or a high - performance copper heatsink for a specialized application, we can provide you with the right solution.
If you are interested in our heatsink extruded products or have any questions about material selection and design, please feel free to contact us. We are more than happy to discuss your requirements and provide you with detailed information and quotations. Our team of experts is committed to helping you find the best heatsink solution for your project.
References
- ASM Handbook, Volume 2: Properties and Selection: Nonferrous Alloys and Special - Purpose Materials.
- Incropera, F. P., DeWitt, D. P., Bergman, T. L., & Lavine, A. S. (2007). Fundamentals of Heat and Mass Transfer.