Evaluation And Selection Of Thermal Grease

Due to poor heat dissipation, CPU is easy to be damaged. In order to extend the reliability and service life of electrical components, thermal conductive silicone grease should be applied to conduct the heat emitted by CPU. While the correct selection of thermal grease and mastering the correct application method have a great impact on the use effect of products.

In actual applications, due to differences in production processes and product use environments, different companies have certain differences in the performance requirements of thermally conductive silicone grease. How to choose thermal grease suitable for their products, DSN believes that the following aspects should be focused on.

1. Fineness: whether the fineness of thermal grease is superior or not can be identified from several aspects, such as uniform colloid, bright color, easy operation, colloid without coarse ore particles and other surface phenomena. Therefore, the selection of thermal grease appearance index and operability is the key step to determine the quality of thermal conductive silicone grease. If the colloid of thermal grease is not uniform, some are thin, some are thick or difficult to operate uniformly, the heat dissipation effect will be reduced, so the fineness of thermal conductive silicone grease is very important.

2. Oil separation degree: it is the amount of silicone oil released after the hot silicone grease is kept at a certain temperature for a certain period of time, and it is an index to evaluate the stability of thermal grease. Many users find that some thermal grease has a layer of oil on the upper layer after being used for a period of time, which indicates that the thermal conductive silicone grease is relatively poor in storage stability. If there is no special process to stir and disperse, the heat dissipation and operability of the product will be reduced. Therefore, the storage stability of thermal conductive silicone grease can be tested for oil separation, and the test method can be consulted with professional manufacturers.

3. Heat resistance: it means that the thermal grease can maintain its excellent performance and prolong its service life under the condition of heating. As we all know, generally, products that can use thermal conductive silicone grease are applied in high temperature environment. The better the heat resistance of thermal conductive silicone grease, the more durable it will be.