Alumina has a chemical formula of Al2O3 and a molecular weight of 101.96. The main component of bauxite. White powder. There are different crystal forms, the common ones are α-Al2O3 and γ-Al2O3. Corundum in nature is α-Al2O3, hexagonal close-packed crystals. α-Al2O3 has a melting point of 2015±15°C, a density of 3.965g/cm3, and a hardness of 8.8. It is insoluble in water, acid or alkali. γ-Al2O3 is a cubic close-packed crystal, insoluble in water, but soluble in acid and alkali, and is a typical amphoteric oxide. use:
This product is a series of fine alumina imported from Germany, which is specially used in high-grade polishing wax and grinding industry. The particle size is uniform, the color is pure white without impurities, and it has an excellent light-emitting effect.
It can be used as abrasive, polishing wax, polishing powder, polishing paste, high-temperature sintered alumina, called artificial corundum. Alumina is also used as a high-temperature refractory material to make refractory bricks, crucibles, porcelain, artificial gems, etc. Alumina is also a raw material for aluminum smelting. Calcined aluminum hydroxide can produce γ-Al2O3. γ-Al2O3 has strong adsorption and catalytic activity, and can be used as adsorbent and catalyst.