Industry dynamic

Reasons influencing thermal conductivity of thermal gel

2020-12-22
Theory of heat conduction effect, the same thermal conductivity of solid thermal conductive materials and thermally conductive silicone is certainly less liquid thermal conductive materials, but some customers feel after using liquid thermal conductivity material effect is not good, in this case, a preliminary estimate is applied when a few problems, the following is the reason why may affect gel effect of thermal conductivity of thermal conductivity.
1. Application thickness:
The application principle of paste material is thickness is thin, daub is even. Thick material means the heat transfer efficiency is low, heat dissipation is slow; Apply evenly to avoid residual air and reduce heat resistance.
2. Effective contact:
During assembly, a certain pressure should be kept as far as possible to make the thermal conducting gel contact with the heat dissipation material more closely, which can not only fill in the tiny gap but also discharge air, to increase the effective contact surface as far as possible.
3. Radiator effectiveness:

Many clients focus only on thermal materials and don't think about whether a radiator is suitable or not. For example, the customer used 2.0w /mK material for the power supply at the beginning, but the thermal conductivity barely met the requirements. The customer wanted to improve and achieve better results, so he used a 5.0w /mK thermal conductivity material. However, the result was surprising: there was no significant difference in the thermal conductivity between the two materials with a large thermal conductivity difference. First of all, the reason of the material is excluded, because the material is verified by many customers, there is no problem in the application, the material surface is smooth without wrinkles, indicating good effective contact, the final reason is judged to be the radiator. Because the radiator is small, the thermal conductivity of 2.0w /mK has been maximized, even with 8.8W/mK. When customers use larger radiators for validation, the results are significantly improved.