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 in protective coatings for metals to enhance wear and corrosion resistance. Utilized in the production of refractory materials because of its high melting point. Found in dental implants and medical prosthetics as a biocompatible ceramic material. Used in microelectronics as an electrical insulator. Also a key component in the manufacture of spark plugs and high-temperature furnace linings.