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Thermal grease-the most commonly used thermal conductive material

Thermal grease is usually composed of composite thermal conductive solid filler, high temperature synthetic oil (base oil such as silicone oil), and a uniform paste material formulated with stabilizers and modified additives. Commonly used thermal greases are white, gray, or gold Thermal grease and other colors. Thermally conductive particles usually use zinc oxide, aluminum oxide, boron nitride, silver oxide, silver powder, copper powder, etc.

Thermal grease product features:
1. The most common thermal interface material is usually applied by printing or dot coating;
2. Because it can wet the heat sink and the device surface well, reduce the contact thermal resistance, so its thermal conductivity is very small, suitable for heat dissipation of high-power devices;
3. Printing or dot coating is required when using, the operation is time-consuming, the process control requirements are relatively high, and the difficulty is great;
4. It is used between the radiator and the device. The radiator is mechanically held. The main advantage is that it is easy to maintain and cheap.

According to practical experience, the relationship between the thickness of thermal grease and performance is that the thinner the thickness, the smaller the thermal resistance, so the thickness should be controlled when used. The method of using silicone grease needs to clean the surface of the device and the radiator with a clean rag cotton cloth and alcohol; and then use printing tools such as steel sheet to print and apply the silicone grease, which can be flexibly selected according to the actual board layout. On the radiator.

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