Industry dynamic

How does the rate of oil separation affect the quality of thermally conductive silicone grease?

2021-03-08

Electrical appliances generate high temperatures when they are in operation, and these can build up if they are not discharged in time, damaging the appliance. Thermal grease is used to improve thermal conductivity and increase heat dissipation in heat sinks.

Why can the quality of thermal grease be judged by the oil ionization rate?

The main raw materials of thermal conductive silicone are silicone and filler. If the silicone evaporates quickly, the remaining silicone and filler will not be in the right proportion and the surface will dry up and cure. The slow evaporation of silicone can guarantee a normal ratio with the filler and the state of the paste will not be affected, thus the thermal conductivity will not be affected.

Good quality products with a low oil separation rate will not cure after years of use. Poor quality products will be found after a while the surface becomes dry, silicone becomes less, too much filler will lead to surface cracking, this kind of product oil separation is high, the thermal conductivity is not good.

Oil separation is an important criterion for judging the quality of thermally conductive silicone grease. Besides, to judge the quality of thermal grease, you can also judge from the price and filler. Some thermally conductive silicone grease uses metal as filler, which strengthens the thermal conductivity but has electrical conductivity and is unsafe to use and cannot be used in large quantities.

In addition to the quality, it is also important to be familiar with the operation method, and it is best to have an experienced master. A thin layer will achieve the desired thermal conductivity. The excessive application will not enhance the thermal conductivity and will not be of any benefit, but will be counterproductive.