Rare earth refers to the lanthanide elements in the periodic table-lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium ( Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and two closely related elements of the lanthanide series There are 17 elements-scandium (Sc) and yttrium (Y).
Rare earth permanent magnetic materials refer to magnetic materials made of alloys formed by rare earth metals and transition metals through a certain process. They are widely used in computers, automobiles, instruments, meters, household appliances, petrochemicals, medical care, aerospace and other industries. All kinds of special motors, nuclear magnetic resonance equipment, electrical devices, magnetic separation equipment, magnetic machinery, magnetic therapy equipment and other components that need to generate a strong gap magnetic field.
NdFeB permanent magnet material is a rare earth iron permanent magnet material represented by neodymium iron boron (Nd-Fe-B). Depending on the production process, NdFeB permanent magnet materials can be divided into two types: sintering and bonding. The sintered NdFeB permanent magnet adopts powder metallurgy technology. The smelted alloy is made into powder and pressed into a compact in a magnetic field.
The compact is sintered in inert gas or vacuum to achieve densification, and in order to improve the coercivity of the magnet , Usually requires aging heat treatment. The bonded NdFeB permanent magnet material is a mixture of NdFeB permanent magnet powder and resin, and pressed into a shape in a magnetic field.
