Used in phosphors for color television screens and LED lighting, enhancing brightness and color quality. Essential in superconductors, enabling materials to conduct electricity without resistance at relatively higher temperatures. Added to alloys to improve strength and resistance to high-temperature oxidation, especially in aerospace and defense applications. Employed in medical lasers for surgical procedures, including dermatology and ophthalmology, due to its efficiency in generating specific light wavelengths. Utilized in cancer treatment through yttrium-90, a radioactive isotope that targets and destroys cancer cells in radioembolization therapy. Found in high-performance ceramics and coatings that withstand extreme heat and corrosion, useful in electronics and industrial equipment.