Silicon Powder is usually used as an ingredient in certain pharmaceuticals and cosmetics products to boost their properties. For off state stress protection by deep p-locations is adopted, for on-state a thick oxide is used in order to circumvent the limits to screen remaining extrinsic oxide defects for thin oxides. https://www.quora.com/profile/Trevor-Flatcher-2/Thermal-Conductivity-of-Silicon-Carbide-and-Heat-Dissipation-Solutions-for-Electronic-Devices-Thermal-management-is-a-c