1. Thermal grease
Thermally conductive silicone grease is a widely used thermally conductive medium at present. It is an ester-like substance formed by a special process with silicone oil as the raw material and fillers such as thickeners. The substance has a certain viscosity and has no obvious graininess. The working temperature of thermal conductive silicone grease is generally -50°C to 220°C. It has good thermal conductivity, high temperature resistance, aging resistance and waterproof characteristics. During the heat dissipation process of the device, after being heated to a certain state, the thermally conductive silicone grease will show a semi-fluid state, fully filling the gap between the CPU and the heat sink, making the two more tightly bonded, thereby enhancing heat conduction.
2. Thermal silica gel
Thermally conductive silica gel is also made by adding certain chemical raw materials to silicone oil and chemically processing it. However, unlike thermal silicone grease, there is a certain viscous substance in the chemical raw materials added to it, so the finished thermal silicone has a certain adhesive force. The biggest feature of thermally conductive silicone is that it is hard after solidification, and its thermal conductivity is slightly lower than that of thermally conductive silicone grease. PS. Thermally conductive silicone is easy to “stick” the device and the heat sink (the reason why it is not recommended to be used on the CPU), so the appropriate silicone gasket should be selected according to the product structure and heat dissipation characteristics.
3. Thermally conductive silicone sheet
Soft silicone thermal insulation gaskets have good thermal conductivity and high-grade voltage-resistant insulation. The thermal conductivity of the gaskets produced by Aochuan ranges from 1 to 8W/mK, and the highest voltage breakdown resistance value is above 10Kv. It is a substitute for thermal conductive silicone grease substitute products. The material itself has a certain degree of flexibility, which fits well between the power device and the heat-dissipating aluminum sheet or the machine shell, so as to achieve the best heat conduction and heat dissipation. It meets the current requirements of the electronic industry for heat-conducting materials. It is a substitute for heat-conducting silicon Grease thermal paste is the best product for binary cooling systems. This type of product can be cut at will, which is conducive to automatic production and product maintenance.
The thickness of the silicone thermal insulation pad varies from 0.5mm to 10mm. It is specially produced for the design scheme of using the gap to transfer heat. It can fill the gap, complete the heat transfer between the heating part and the heat dissipation part, and also play the role of shock absorption, insulation and sealing. , can meet the design requirements of miniaturization and ultra-thinning of social equipment. It is a new material with great manufacturability and usability. The flame retardant and fireproof performance meets the requirements of U.L 94V-0, and meets the EU SGS environmental protection certification.
4. Synthetic graphite flakes
This kind of heat conduction medium is relatively rare, and it is generally used on some objects that generate less heat. It adopts graphite composite material, after certain chemical treatment, it has excellent heat conduction effect, and is suitable for heat dissipation system of electronic chips, CPU and other products. In the early Intel boxed P4 processors, the substance attached to the bottom of the radiator was a graphite thermal pad called M751. “Uproot” the CPU from its base. In addition to the above-mentioned common heat-conducting media, aluminum foil heat-conducting gaskets, phase-change heat-conducting gaskets (plus protective film), etc. are also heat-conducting media, but these products are rare in the market.
Post time: May-24-2023