氢化镝

Dysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. As-cast dark gray powder is extremely susceptible to oxidation and ignition in the air. Dysprosium is an important additive for NdFeB permanent magnets to raise the Curie temperature and improve temperature coefficiency. It is highly susceptible to magnetization, they are employed in various data-storage applications, such as in hard disks. Dysprosium is used, in conjunction with vanadium and other elements, in making laser materials and commercial lighting. Because of dysprosium's high thermal-neutron absorption cross-section, dysprosium-oxide–nickel cermets are used in neutron-absorbing control rods in nuclear reactors.