Used as an abrasive in sandpapers and grinding wheels due to its hardness. Commonly employed in cutting tools and polishing compounds. Serves as a catalyst support in chemical reactions. Applied as a protective coating on metals and optical surfaces for wear and corrosion resistance. Used in the production of aluminum metal through electrolysis. Found in dental implants and medical devices because of its biocompatibility. Utilized in electronics as an electrical insulator with high thermal conductivity. Also used in chromatography as a stationary phase for separating mixtures.