Thermal conductive grease differs greatly from RTV
2022-06-16
Thermally conductive silicone is a one-component dehydrated room temperature curing silicone rubber (RTV), with the effect of sealing, bonding, protection, flame resistance and thermal conductivity of electronic devices. The general temperature resistance range can be from -60-280°C. It can be cured and cured into a hard elastomer in a short time at room temperature. After curing, it fits closely to its contact surface to reduce thermal resistance, thus facilitating the heat transfer between the heat source and its surrounding heat sink, motherboard, metal case and shell. It has the advantages of high thermal conductivity, good insulation and ease of use, and has good adhesion to metals including copper, aluminium and stainless steel.
Generally speaking, the thermal conductivity is slightly worse than thermal grease, the adhesion is stronger and once cured, it is difficult to separate the bonded objects, so it can only be used for graphics cards and memory heatsinks. If it is used on the CPU, it will cause overheating and it is difficult to remove the heatsink, and pulling it down with force may directly damage the CPU or CPU socket. If you pull down on a silicone bonded graphics card heatsink, you risk pulling the display chip off the PCB. Tensan also offers heat conductive adhesives that can be cured by heating to meet the requirements of some high strength and high adhesion products.
Although the difference between silicone grease and adhesive is only one word, and both are thermally conductive materials, they are two completely different things. Silicone grease has a wider range of application and is suitable for almost any thermal condition, while silicone is difficult to remove once it is glued on, so it is mostly used in situations where only a one-off bond is required, such as the heat sink of a graphics card.
In heat dissipation and thermal conductivity situations, even when two flat surfaces are in contact with each other, there are gaps where the air is a poor conductor of heat and can prevent the transfer of heat to the heatsink.The air in these gaps is a poor conductor of heat and prevents heat from being transferred to the heatsink. There are many different types of silicone grease on the market today, with different parameters and physical characteristics determining different uses, for example, some are suitable for CPU thermal conductivity, some for memory thermal conductivity, and some for power supply thermal conductivity. For example, some are suitable for CPU thermal conductivity, some for memory thermal conductivity and some for power supply thermal conductivity.If any questions, please contact us at sales02@sztensan.com.
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