A thermal transfer composite material with aluminum - powder, method for producing the composite material and use of the composite material

摘要

The present invention relates to a thermally conductive composite material with of a cross-linkable, or at least in part, a cross-linked polymer - base - material and in the polymer - base - material divided aluminum - powder. The aluminum - powder aluminum has - particles having grain sizes from the range from 0,05 μm to 400 μm. A proportion of aluminum - particles with a particle size of less than 1 μm at the aluminum - powder is from the range of 1 w -% to 50 w -% selected. In addition, a method for the manufacture of the composite material with the following process steps: a) providing a starting material of the polymer - base - material and providing the aluminum - powder and b) mixing of the starting material and of the aluminum - powder to one another. The basic idea of the invention consists in providing an aluminum - powder with aluminum - particles as filler for the thermally conductive composite material, which have very greatly different grain sizes. In addition, the proportion of aluminum - particles with small particle sizes of high. As a result, it is possible to provide a composite material with a high thermal conductivity. The thermal conductivity is moved in a range of above 7 w / (m * k). At the same time, it is of the composite material in the uncrosslinked or only partially cross-linked state very good processing. In addition, the composite material also by a low electrical conductivity of. Thus, the composite material is very suitable for use in assemblies ..