Rare earth doped tungsten needle are made by adding rare earth elements to the tungsten alloy during the manufacturing process to make the tip of the tungsten needle sharper and improve its mechanical properties. Rare earth elements refer to the lanthanide elements in the periodic table, which usually include lanthanum (La), cerium (Ce), neodymium (Nd), promethium (Pr), samarium (Sm), gadolinium (Eu), terbium (Gd), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm) and ytterbium (Yb), etc.
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