Preparation and Properties of High Temperature Resistant Silicone Thermal Insulation Composites
The silicone thermal insulation composites were prepared with high viscosity two-component silicone as base,the modified alumina as filler,and polyimide film(PI).The performance of the composites was tested,as well as its performance changes after aging for 1,000 hours under high temperature of 250 ℃,cold-hot cycles.Result show that the silicone thermal in-sulation composites has thermal conductivity of4.2 W/(m·K),Shore OO hardness of 65,the density of3.35 g/min,the tensile strength of 10.5 MPa,the elongation at break of 56％,the breakdown voltage of 17.8 kV/mm,and the DC insulation resistance(1 kV)is 56,752 MΩ.It has good high temperature and aging resistance and is expected to be further applied in the field of new energy vehicles.
high temperature resistancesiliconethermal conductivityinsulationcomposites
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维普
