Which has higher thermal conductivity, aluminum alloy or thermal conductive silica gel sheet?

Heat-conducting silica gel sheets can be divided into ordinary heat-conducting silica gel sheets, high-viscosity heat-conducting silica gel sheets, heat-conducting silica gel sheets with back silica gel and glass fiber sandwiched between them. At present, the thermal conductivity of thermal conductive silica gel sheets in China ranges from 0.8W/m.k to 8.0 W/m.k. ..

Aluminum fins also include pure aluminum and various aluminum alloys. The thermal conductivity of various aluminum materials is pure aluminum 237? W/m.K, 606 1 aluminum alloy 155? W/m.K, 1070 aluminum alloy 226? W/m.K, 1050 aluminum alloy 209? W/m.K, 6063 aluminum alloy? 20 1? W/m.K？ .

Obviously, the thermal conductivity of aluminum alloy is higher, and the thermal conductivity of silica gel sheet is higher than that of air, so it is necessary to add thermal conductive silica gel sheet to aluminum alloy and devices. The thickness of the heat-conducting silica gel sheet should match the shape and space of the aluminum alloy, leaving a deformation coefficient, and the thickness is not necessarily small.