What materials does the electronics heat sink use?
[ Date: 2020-09-25 09:47:38 Author: Popularity: ]
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Nowadays, there are more and more kinds of electronic products around us. When we choose, we will not only compare their functions, but also consider the appearance. The current development trend of electronic products is thin and light weight. Therefore, there will be a challenge, that is, the internal space of electronic products is becoming more and more narrow. How to fully help the heat dissipation of electronic products in the limited space is a matter needing special attention.


It requires the heat sink to achieve light weight, strong thermal conductivity, strong plasticity, only relying on the limited size to play the maximum heat dissipation performance, in order to truly achieve the cooling escort for electronic products. So what kind of material can we choose to make the radiator which meets the requirements of the shape and size without losing the heat dissipation effect? Now let's know a few common materials used to make radiators.

1 Plastic heat sink

The common plastic radiator is made by filling some metal oxide powder, carbon powder, fiber or ceramic powder into the plastic to improve its thermal conductivity. This kind of plastic radiator is very light in quality, which is in line with the demand of electronic products. In addition, it has the characteristics of strong plasticity and low cost, which is favored by many manufacturers.

However, compared with the heat sink made of metal alloy, its thermal conductivity is not stable, and the thermal conductivity changes greatly, which can not ensure that it can adapt to the working environment perfectly, and even deform after working for a long time. Therefore, its safety and stability need to be improved.

2 Copper heat sink

The chemical properties of copper are unstable, and it is difficult to react with oxygen and water in the air at room temperature. Therefore, the manufacturer can ensure the long service life of copper radiator without precision and complex post-processing. Secondly, the cooling capacity of copper heat sink can be regarded as excellent. It often absorbs heat quickly and dissipates heat quickly. The cooling capacity and corrosion resistance of copper radiator are stronger than that of aluminum.

Although the copper heat sink has its advantages, but the price is often very expensive, economic conditions are limited, it is generally not recommended to consider the use of this radiator. And the quality is very heavy, far from being able to meet the requirements of lightweight electronic products.

3 Aluminum heat sink

Aluminum alloy is the hot radiator manufacturing material on the market, among which the Aluminum Alloy 6063 and 6061 are of high quality. Although its heat dissipation performance is not comparable to that of copper, its heat dissipation coefficient can reach 201W/mK, which can fully meet the requirements of electronic products for heat dissipation. In addition, it has the characteristics of light weight, simple processing, beautiful appearance and affordable price, which makes it widely used.

The electronics heat sink uses Aluminum Alloy 6063 / 6061. In order to make the radiator appearance more decorative, longer service life and stronger heat dissipation performance, it will carry out multi-channel processing technology for the products. Through sand blasting, wire drawing and laser technology, the surface of the radiator is more clean and smooth, and the decoration is strengthened. In addition, electroplating, anodizing and paint baking processes are used to improve the overall wear resistance, corrosion resistance and heat resistance of the radiator by adding electrodeposited coating, oxide layer and paint of special materials on the surface, so as to improve the performance and durability of the radiator.

4 Graphite radiator


As a new type of heat conduction and heat dissipation material, graphite is mainly made of a single carbon element, but it has thermal conductivity comparable to metal materials. Compared with copper and aluminum metal, graphite is lighter in weight, more stable in chemical properties, and can be ultra-thin. It is indeed a very good radiator material. However, the price of graphite material itself is very expensive. Sometimes the processing cost and die cutting management fee of graphite radiator are even more expensive than the material cost. Therefore, the cost of using graphite radiator is very expensive, and its application is not very wide.


In today's light and thin development of electronic products, manufacturers strive to adapt to the development trend, uses high-quality materials to customize the heat sink. In terms of quality, it is light and ultra-thin, the appearance is exquisite and generous, and the cooling capacity is improving, providing reliable products and meticulous service for customers.