Used as an abrasive in sandpapers and grinding wheels due to its hardness. Commonly found in cutting tools and polishing compounds. Serves as a catalyst support in chemical reactions. Applied in protective coatings for metals to enhance corrosion resistance. Used in the production of refractory materials because of high thermal stability. Found in dental implants and prosthetics as a biocompatible ceramic material. Employed in electronics as a dielectric material in integrated circuits. Used in filtration systems to remove water and impurities from gas streams. Also utilized in the manufacture of aluminum metal through the Hall-Héroult process.