1. White corundum is alumina, which is fused alumina. The raw material of white corundum is alumina, which is smelted at high temperature to become fused alumina, also called white corundum. White corundum smelted at high temperature (fused oxidation) Aluminum) is harder, Mohs hardness 9
2. The main component of white corundum is alumina. Specifically, it is the crystal form of aluminum oxide, α-Al2O3. In addition to aluminum oxide, there are also small amounts of impurities such as iron oxide and silicon oxide. Aluminum oxide is a stable oxide of aluminum. The main elements are oxygen and aluminum, and the chemical formula is aluminum oxide. There are many uniform and non-uniform crystals, such as α-Al2O3, β-Al2O3 and γ-Al2O3.
3. Physical properties: The melting point of white corundum is 2250°C, and its appearance is triangular. The melting point of alumina is lower than 2010℃-2050℃. Its appearance is white powder, and its crystal phase is γ phase.
4. White corundum is generally used to make abrasives, and can also be used in catalysts, insulators, casting, sandblasting and other industries. Alumina is mainly used in thermal conductivity, polishing, electroplating, catalyst and other industries