Preparation and properties of filled silicone-based thermal conductive gel
Taking silicone-based thermal interface materials as the research object,a series of filled silicone thermal conductive gel samples were prepared by using silicone oil with different viscosity ratios as the matrix,and alumina and zinc oxide as the thermal conductive fillers.The effects of gel composition on the mechanical properties,thermal conductivity,dispensing properties of the materials were investigated,respectively.The research results showed that the thermal conductivity of the prepared silicone thermal conductive gel was mainly affected by the thermal conductive filler.When the proportion of high-viscosity vinyl silicone oil was 50％,the thermal conductive gel had good properties,with the tensile strength,elongation at break,Shore hardness,thermal conductivity and extrusion rate reaching 0.37 MPa,184％,63.42,2.90 W/(m·K)and 106.4 g/min,respectively.In addition,the thermal conductive gel samples in this study performed well in high temperature and high humidity environments and in hot and cold cycle tests,which could meet the requirements of the industry and have good application prospects and application values.
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