Views: 6 Author: Site Editor Publish Time: 2021-07-06 Origin: Site
A high performance heat sink is a device for dissipating heat from electronic components that are easy to heat in electrical appliances. It is mostly made of aluminum alloy, brass or bronze in plate, sheet, and multi-sheet shapes, such as the CPU central processing unit in the computer. Considerable large heat sinks, power tubes, line tubes in TV sets, and power amplifier tubes in power amplifiers all use heat sinks. Generally, the heat sink should be coated with a layer of thermally conductive silicone grease on the contact surface of the electronic component and the heat sink during use, so that the heat emitted by the components can be more effectively transferred to the heat sink, and then radiated to the surrounding air through the heat sink.
As far as the heat sink material is concerned, the thermal conductivity of each material is different. They are arranged from high to low in terms of thermal conductivity. They are silver, copper, aluminum and steel. However, it would be too expensive to use silver as a heat sink, so the best solution is to use copper. Although aluminum is much cheaper, it is obviously not as good as copper in thermal conductivity (about 50% of copper).
At present, the commonly used heat sink materials are copper and aluminum alloy, both of which have their own advantages and disadvantages. Copper has good thermal conductivity, but it is more expensive, difficult to process, too heavy (many pure copper radiators exceed the weight limit of the CPU), small heat capacity, and easy to oxidize. The pure aluminum is too soft to be used directly. The aluminum alloy used can provide sufficient hardness. The advantages of aluminum alloy are low price and light weight, but the thermal conductivity is much worse than that of copper. Some radiators take their own strengths and embed a copper plate on the base of the aluminum alloy radiator.
The high performance heat sink plays an important role in the composition of the radiator. In addition to the active heat dissipation of the fan, evaluating the quality of a radiator largely depends on the heat absorption capacity and heat conduction capacity of the heat sink itself.
