Patent ID: 6914025

Claim:
A heat conductive composite material made from a mixture of diamond particles and comprising diamond particles, silicone carbide and silicon or silicon alloy, the silicon carbide forms an interconnected skeleton structure surrounding each individual diamond particle and silicon or silicon alloy fills the interstices of the silicon carbide skeleton, transformed diamond being the only carbon source in the material, wherein said conductive material has a diamond content of at least 58 vol % and 81 vol % at the most, a silicon carbide content of at least 3 vol % and 39 vol % at the most and a content of silicon or silicon alloy of 41 vol % at the most, and the diamond particles consist of at least two fractions with different particle size, at least 50 wt % of the particles in the mixture of diamond particles, from which the conductive material is made, having a diameter of 80 μm or above, whereby the conductive material has a thermal diffusivity of at least 2.1 cm 2 /s and a thermal conductivity of at least 400 W/mK.