Rare Earths Members
Neodymium (Nd) is the element after which Neodymium magnets are named.
Praseodymium (Pr) is so close to Neodymium (Nd) that it is used in Neodymium magnets. Pr is right next to Nd on the periodic table and it’s properties are very similar to those of Nd. So similar that about 25-35% of the Nd in NdFeB is actually Pr.
Dysprosium (Dy) is the major element added to Neodymium magnets to increase their performance at higher temperatures and when exposed to high opposing magnetic fields.
Terbium (Tb) is another major element (instead of or in addition to Dysprosium) added to Neodymium magnets to increase their performance at higher temperatures and when exposed to high opposing magnetic fields.
Rare Earths Members
Lanthanum (La) is a light rare earth element that has been shown on an R&D scale to be an acceptable partial substitute for Neodymium in association with Cerium in a controlled ratio and along with microstructural advancements. This new technology is expected to entre mass production at a future date.
Cerium (Ce) is a light rare earth element that has been shown on an R&D scale to be an acceptable partial substitute for Neodymium in association with Lanthanum in a controlled ratio and along with microstructural advancements. This new technology is expected to entre mass production at a future date.
Holmium (Ho)is sometimes added to Neodymium magnets to increase their performance at higher temperatures and when exposed to high opposing magnetic fields.
Heavy Rare Earth Elements. Refers to members of the Lanthanide series of the Periodic Table beginning with Europium and higher atomic weight elements Gadolinium (Gd), Terbium (Tb), Dysprosium(Dy), Holmium (Ho), Erbium (Er), Thulium (Tm), Ytterbium (Yb) and Lutetium (Lu).
Light Rare Earth Elements, beginning with Lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), Promethium (Pr) Samarium (Sm) and Europium (Eu).
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