What will the hardness of the thermal conductive silicone film affect?

Thermally conductive silicone sheet is a kind of gap-filling thermal pad made of silicone resin as the base material and added with temperature-resistant and thermally conductive materials. It has the characteristics of high thermal conductivity, low interface thermal resistance, insulation, compressibility, etc., because Its softer hardness makes it possible to realize a smaller thermal resistance under low pressure conditions, and at the same time eliminates the air between the contact surfaces and fully fills the rough surface between the contact surfaces, improving the heat conduction effect of the contact surfaces. Because of the good filling effect of the thermally conductive silicone sheet, it can effectively conduct the heat of the heat source to the shell, and the thermally conductive silicone sheet has good compressibility and elasticity, and can serve as a shock-absorbing pad.
There are many parameters of thermally conductive silicone sheets, such as thermal conductivity, thermal resistance, compressibility, size and thickness, temperature resistance range, breakdown voltage and volume resistance, etc., and corporate purchasers often ignore the hardness parameter. In the eyes of many purchasers, the thermal conductive silicone sheet is a kind of soft thermal pad, and the hardness should be relatively uniform, but this is wrong. The hardness affects the thermal conductivity of the thermal conductive silicone sheet.

The high and low hardness of the thermally conductive silicone film affects the thermal conductivity of the thermally conductive silicone film. For example, two sets of thermally conductive silicone films with the same parameters except the hardness, and low-hardness thermally conductive silicone films, can effectively fit the surface of the heat source and have low thermal resistance. The thermal conductive silicone sheet with high hardness also has better thermal conductivity, while the thermal conductive silicone sheet with high hardness has the opposite effect, but it is not the thermal conductive silicone sheet that the lower the hardness, the better.

Thermally conductive silicone sheet is a solid sheet. If the hardness is too low, it will cause the thermally conductive silicone sheet to be too soft and inconvenient to operate. The thermally conductive silicone sheet with high hardness is not easy to deform and easy to operate during work, and has special requirements for equipment. A thermally conductive silicone sheet with a certain hardness is used, so the hardness of the thermally conductive silicone sheet cannot be unilaterally considered that the higher the better or the lower the better, the product engineer of the enterprise needs to determine the hardness value of the thermally conductive silicone sheet according to the needs of the equipment, in order to be effective The performance of thermally conductive silicone sheet.