What is the difference between aluminum oxide and silicon carbide ?
Aluminum oxide is an inert chemical that has a hardness of 9 on Mohs scale, which is very similar to silicon carbide, though silicon carbide is much more inert chemically speaking.
Silicon carbide is much more conductive since it can be used as a semiconductor. While aluminum is ideal for sandpaper crystals, silicon carbide is better suited for cutting material. It is also used more often on other materials, such as on car disc brakes.