The best metal for heat dissipation is silver.
The heat dissipation performance of metal is the thermal conductivity.
Thermal conductivity coefficients of common metals:
Silver 429 W/mK
Copper 401 W/mK
Gold 317 W/mK
Aluminum 237 W/mK
Type 1070 aluminum alloy 226 W/mK
Type 1050 aluminum alloy 209 W/mK
Type 6061 Aluminum alloy 155 W/mK
6063 aluminum alloy 201 W/mK
The relevant knowledge of the heat sink is as follows:
1. The heat sinks are all made of aluminum Alloy (due to the insufficient hardness of pure aluminum, it is relatively inconvenient to carry out a series of processing and technical improvements. Although many manufacturers have developed it, it is also very expensive), because the processability and surface treatment of aluminum alloy are quite It's much easier and simpler, and its cost is quite low. Some friends may ask, copper is the best radiator material today, so why not use it? Although the thermal conductivity of copper is almost twice that of aluminum, this does not mean that the heat dissipation effect of a copper radiator can be twice that of an aluminum alloy radiator (the heat dissipation efficiency of the heat sink is not only affected by the thermal conductivity of the material) . Disadvantages of copper: higher price, higher quality due to higher density (also means higher static gravity or ensuring a certain quality by controlling the volume of the radiator), unsatisfactory hardness, etc. factor. Therefore, despite this, some heat sinks are still made of pure copper or a combination of copper and aluminum.
2. Silver is the best conductive media, but its metal is very soft, which is not conducive to manufacturing high-density metal objects such as radiators. Gold, ranked third, also has very good properties. Conductivity coefficient, but its expensive "value" is not one of the metals considered by radiator manufacturers. Of course, soft silver can be made into high-end thermal grease (for example: Arctic Silver is this type of thermal grease, and of course, its value is quite expensive).
3. The final conclusion on the manufacturing materials of air-cooled radiators is that copper and aluminum are the mainstream radiator choices today.