What factors will affect the thermal conductivity of silicone heat conductive sheet

The base material of silica gel thermal conductive sheet is generally silica gel. This kind of silica gel can be synthesized by adding various auxiliary materials such as metal oxides through special processes as thermal conductivity medium materials. Then there are some specific factors that affect the thermal conductivity of these silicone heat conductors. What is it? What is it

1, the type and characteristics of the polymer matrix material: Generally speaking, the higher the thermal conductivity of the matrix material, the better the basic dispersion of the filler, the better the degree of combination between them, so as to produce better thermal conductivity of silicone heat conductive sheet.

2, the type of packing: the higher the thermal conductivity of the packing, the higher the thermal conductivity of the silicone sheet, which will directly affect the thermal conductivity of the silicone sheet.

3, filler content: the distribution of filler polymer can generally determine the thermal conductivity of silicone heat conductive sheet. When the filler content is small, the general thermal conductivity effect is not obvious; When the direction of the heat network chain is consistent with the direction of the heat flow, the thermal conductivity will be the best. Therefore, the amount of thermal conductivity filler has a critical value.

4, filling shape: easy to form the path of thermal conduction sequence is whisker, fiber, sheet and particle. The easier the filler is to form a thermal conduction path, the better the thermal conductivity.

5, the binding characteristics of the interface between filler and matrix material: the higher the degree of binding between filler and matrix, the better the thermal conductivity. If a suitable coupling agent is used to treat the surface of the filler, the thermal conductivity can generally be increased by 10%. % ~ 20%