What is the difference between white corundum and alumina
White corundum and alumina are not the same substance. As for the reason, let the editor from Henan Sicheng tell you in detail: What is the difference between white corundum and alumina?
1. White corundum is an artificial abrasive made of alumina as raw material and melted and cooled at high temperature. Alumina is a high hardness compound.
2. The main component of white corundum is alumina. Specifically, it is the crystal form of alumina, namely α-Al2O3. In addition to alumina, there are a small amount of impurities such as iron oxide and silicon oxide. Alumina is a stable oxide of aluminum. The main elements are oxygen and aluminum, and the chemical formula is alumina. 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℃, and the appearance crystal form is trigonal crystal. The melting point of alumina is lower than 2010°C-2050°C. Its appearance is white powder, and its crystal phase is γ phase.
4. White corundum is generally used in the manufacture of abrasives, but can also be used in industries such as catalysts, insulators, casting, and sandblasting. Alumina is mainly used in industries such as heat conduction, polishing, electroplating, and catalysts.