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. Employed in the production of aluminum metal through electrolysis. Used in ceramics and refractory materials because of high thermal stability. Applied as a coating to provide wear and corrosion resistance on metal surfaces. Found in biomedical implants for its biocompatibility and durability. Used in electronics as a dielectric material in integrated circuits. Also utilized in chromatography as a stationary phase for separating mixtures.