As far as the material of automobile radiators is concerned, each material has different thermal conductivity, which are arranged from high to low, including silver, copper, aluminum, and steel. However, if silver is used as the heat sink, it will be too expensive, so the best solution is to use copper. Although aluminum is much cheaper, it is obviously not as good as copper (about 50% of copper).
Currently, the commonly used heat sink materials are copper and aluminum alloy, both of which have their advantages and disadvantages. Copper has good thermal conductivity, but it is more expensive, difficult to process, and overweight (many pure copper heat sinks exceed the CPU's weight limit), and its heat capacity is small and easily oxidized. Pure aluminum is too soft to be used directly. All aluminum alloys used can provide sufficient hardness. The advantages of aluminum alloy are low price and light weight, but the thermal conductivity is much worse than copper. Some radiators have their own advantages, and a copper plate is embedded in the aluminum alloy radiator base.
For ordinary users, the use of aluminum heat sink is enough to meet the heat dissipation needs.
The northern heating radiator is also called a heat sink.
The heat sink plays an important role in the composition of the automobile radiator. In addition to the active cooling of the fan, assessing the quality of a radiator depends largely on the heat sink's ability to absorb heat and conduct heat.