... OXIDE HYDRATE Medium Particle Size(D50): 3 um Ultimate Crystal Size: 2-4um use for ceramics,refractory,polishing Product DescriptionCalcined Alumina ... 7. Outstanding resistance to corrosion Property: Calcined Alumina is white powder, good flowability, performance stability, ... wear-resisting, corrosion-resisting products, such as high alumina refractory products, strong ceramics, high grade abrasive, ...