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Factors affecting the thermal conductivity of thermally conductive putty
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Factors affecting the thermal conductivity of thermally conductive putty

Views: 6     Author: Site Editor     Publish Time: 2022-01-31      Origin: Site

Thermally conductive putty is an excellent thermal interface material. In recent years, thermally conductive putty has been widely used in consumer electronics, communication networks, electric power, automotive electronics, medical, transportation and aerospace. But when many people use it, they find that the effect of thermally conductive putty is good or bad. What affects the thermal conductivity of thermally conductive putty?

Below, we will briefly analyze the possible reasons for these problems with thermally conductive putty.

1. Applicable thickness: Many customers do not pay attention to the thickness when using thermally conductive putty. When using thermally conductive putty, they apply a thickness of 3 mm, but they cannot get good thermal conductivity. So it is concluded that this thermally conductive putty material is not good. In fact, the application of thermally conductive putty, the principle of use is that the thickness is thin and the application is uniform. Thick material means inefficient heat transfer, which results in slow heat generation, and even application avoids air trapping, which reduces thermal resistance.

thermally conductive putty

2. Effective contact: When applying thermally conductive putty, keep a certain pressure as much as possible, so that the thermally conductive putty can be in closer contact with the heat dissipation material, fill the small gap, exhaust air, and maximize the heat conduction of the effective contact surface.

3. Radiator performance: Many customers only pay attention to thermal conductivity materials, without considering whether the radiator is suitable. For example, the customer used the 2.0W/mK material for the power supply for the first time, and the heat conduction effect was barely obtained, but the customer used 5.0W/mK heat conduction material in order to improve and obtain better results.

But unexpectedly, there is no obvious difference in the thermal conductivity. After verification by customers with abundant materials, it shows that there is no problem in the application. The surface of the material is flat, without wrinkles, and the effective contact is also very good. In the end it turned out that the problem was with the radiator. Because the heat sink is small, maximum performance can be achieved with 2.0W/mK thermally conductive material. If the customer uses a larger heat sink for verification, the thermal conductivity will be significantly improved.


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