What is thermally conductive silicone and how to use thermally conductive silicone correctly

Core tip: thermally conductive silicone is an excellent thermal conductive compound, and its non-solidified and non-conductive properties can prevent dangers such as short circuits; its high bonding function and strong thermal conductivity are the most important factors when touching the current CPU, GPU and radiator. A complete thermal solution.

Thermally conductive silica gel is an excellent thermal conductive compound, and its non-solidified and non-conductive properties can prevent dangers such as short circuits; its high bonding function and strong thermal conductivity are relatively perfect when touching the CPU, GPU and radiator. Thermal Solutions. Thermally conductive silica gel can be widely applied to various electronic products, the touch surface between the heating element (power tube, thyristor, electric heating stack, etc.) It acts as a heat transfer medium and functions as moisture-proof, dust-proof, anti-corrosion and shock-proof.

The main purpose of using thermally conductive silicone sheet is to reduce the touch thermal resistance between the surface of the heat source and the touch surface of the heat sink.

The thermally conductive silicone sheet can well fill the open space of the touch surface and squeeze the air out of the touch surface. The air is a poor conductor of heat, which will seriously hinder the transfer of heat between the touch surfaces; with the compensation of the thermally conductive silicone sheet, the touch The face is better and fully touched, and the real face-to-face touch. The temperature response can reach the smallest possible temperature difference.

The thermal conductivity of thermally conductive silicone is relative, although its thermal conductivity is better in flexible materials, generally in the range of 0.6-1.5W/(m K), a small amount of performance may be higher, but it does not exceed 2W/( m·K). Compared with water 0.5, vulcanized rubber 0.22, vaseline 0.184 [1], etc., it is higher. But with the 1.5W/(m·K) of cement, there is no advantage. The thermal conductivity of almost all metals is much higher than that of thermally conductive silicone. The thermal conductivity of gold, silver, and copper in metals is between 330 and 360, and the thermal conductivity of aluminum is about 200. Thermally conductive silica gel itself is not a good conductor of heat. The function of thermally conductive silica gel is to fill the space between the heat source and the radiator. Therefore, the thinner the thermal conductive silicon, the better. It can be modified with 0.1-0.5 mm thick thermal conductive silica gel to fill the space, which is much better than 1 mm thick silica gel sheet.