The neodymium iron boron permanent magnet material is a permanent magnet material based on the intermetallic compound ND2FE14B. The main components are rare earth (ND), iron (FE), and boron (B). In order to obtain different properties, rare earth ND can be replaced by some other rare earth metals such as dysprosium (Dy) and praseodymium (Pr). Iron can also be partially replaced by other metals such as cobalt (Co) and aluminum (Al). The content of boron is small, but However, it plays an important role in the formation of tetragonal crystal structure intermetallic compounds, making the compounds have high saturation magnetization, high uniaxial anisotropy and high Curie temperature.

The sintered NdFeB permanent magnet material adopts powder metallurgy technology. The smelted alloy is made into powder and pressed in a magnetic field to form a compact. The compact is sintered in an inert gas or vacuum to achieve densification, in order to improve the coercivity of the magnet , Usually requires aging heat treatment.

Sintered NdFeB permanent magnet materials have excellent magnetic properties and are widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. The more common ones are permanent magnet motors, speakers, magnetic separators, Computer disk drives, magnetic resonance imaging equipment meters, etc.