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Which one is better, thermal gel or thermal grease?

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Thermal conductive gel is a new gel-like thermal interface material made of silicone composite thermally conductive filling material in recent years, which is stirred, mixed and encapsulated. Thermal grease is the predecessor of thermal interface materials. Both materials are in the form of paste, but silicone grease is "thinner" and thermal gel is more "viscous". Many people have never been able to tell the difference between thermal gel and thermal grease, thinking that they are just called differently. Let’s take a look at the differences between the two:

Let’s first understand what thermal interface materials are:
Thermal Interface Materials (TIM) is one of the common heat dissipation methods. Heat dissipation is an enduring topic. The normal operation of our familiar mobile phones, tablets and computers cannot be separated from the heat conduction effect of various thermal conductive materials. , especially with the current development of smart devices with high performance and thinness, the requirements for thermal conductive materials are constantly increasing, and thermal conductive products are also being rapidly upgraded.

What is thermal grease?
Thermal conductive silicone grease is a kind of high thermal conductivity insulating silicone material. Silicone grease refers to organic silicone as the main raw material. It is the most widely used thermal conductive medium at present. The material is a paste liquid. It uses silicone oil as the raw material and adds Fillers such as thickeners are an ester-like substance formed after heating, decompression, grinding and other processes. They have a certain viscosity and no obvious graininess. Can effectively fill various gaps. The color has different colors due to different thermal conductive materials added. Its main raw material is organic silicone (Silicones, commonly known as silicone oil or dimethyl silicone oil), so it has good thermal conductivity, temperature resistance, insulation properties, and is not easy to dry out. It has the following good characteristics:
1. It has good heat conductivity and is non-drying, non-solidifying, non-melting, odorless and non-toxic;
2. Excellent thermal conductivity, with low oil separation, no oil separation at high temperatures, and no flow at high temperatures;
3. Excellent insulation performance, non-toxic, odorless, non-curing, non-corrosive to the base material, and stable chemical and physical properties;
4. Resistant to high and low temperatures, water, ozone, and weather aging, and can be used for a long time in high and low temperature environments;
5. Good thixotropy, moderate consistency, easy to use, and simple coating or potting process;
6. It has excellent electrical insulation, excellent thermal conductivity, low oil separation (tending to zero), high and low temperature resistance, water resistance, ozone resistance, and weather aging resistance.
Thermal grease is usually used for heat conduction and heat dissipation of electronic components such as power amplifiers, transistors, electron tubes, and CPUs, thereby ensuring the stability of the electrical performance of electronic instruments and meters. It can be widely coated on the contact surface between the heating elements (power tubes, thyristors, electric heating piles, etc.) and heat dissipation facilities (heat sinks, heat strips, shells, etc.) in various electronic products and electrical equipment. Heat transfer medium and moisture-proof, dust-proof, anti-corrosion, shock-proof and other properties. It is suitable for surface coating or integral potting of various microwave devices such as microwave communications, microwave transmission equipment, microwave dedicated power supplies, regulated power supplies, etc. This type of silicon material provides excellent thermal conductivity for electronic components that generate heat. Such as: transistors, CPU assembly, thermistors, temperature sensors, automotive electronic parts, automotive refrigerators, power modules, printer heads, etc.

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