Composition And Working Principle of Thermal Grease

As a commonly used thermal interface material, Thermal Grease is widely used in various electronic devices, such as thermal management between CPU, GPU, heat sink and power components.

What is Thermal Grease?

Thermal Grease, also known as thermal paste, is a viscous substance with high thermal conductivity and insulation properties. Its main function is to fill the tiny gaps between two surfaces and improve the efficiency of heat conduction.

Main ingredients of Thermal Grease

Silicone oil: Silicone oil is the matrix of Thermal Grease, which acts as an adhesive and lubricant.

Thermal conductive filler: Thermal conductive filler is the most important ingredient in Thermal Grease, which directly affects its thermal conductivity. Additives: In order to improve the properties of silicone grease, such as fluidity, durability and oxidation resistance, manufacturers will add some additives to the formula.

Working principle

In electronic devices, the surfaces of components and heat sinks cannot be completely smooth, and there are always tiny bumps and air gaps, and the thermal conductivity of air is very poor, which will affect the heat dissipation effect.

Reduce thermal interface thermal resistance: The air gap between electronic components and heat sinks will generate thermal resistance and hinder heat transfer.

Distribute heat evenly: Thermal Grease can evenly distribute heat on the radiator to avoid local overheating.

Improve heat dissipation: When electronic components heat up, Thermal Grease can effectively conduct heat to the radiator, and then dissipate the heat into the air through the radiator.

Precautions for use

Apply evenly: Apply evenly between electronic components and radiators to avoid applying too thick or too thin.

Replace regularly: Over time, Thermal Grease may dry or age due to high temperatures, resulting in reduced thermal conductivity.

Choose the right Thermal Grease: Choose the right Thermal Grease product based on the heat generated by the device, the working environment, and the budget.

Understanding the composition and working principle of Thermal Grease will help us better select and use such products to ensure the stability and service life of electronic devices.

If you have any questions about the selection or use of Thermal Grease, please communicate with us in the comment area!