The NdFeB permanent magnet material is a permanent magnet material based on the intermetallic compound Re2Fe14B. The main components are rare earth elements neodymium (Nd), iron (Fe), and boron (B). Among them, the rare earth element is mainly neodymium (Nd). In order to obtain different properties, some other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) can be substituted. Iron can also be partially replaced by other metals such as cobalt (Co) and aluminum (Al). The content of boron is small, but 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 third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets. Its main raw material is rare earth metal neodymium 29%-32.5%, metallic element iron 63.95-68.65%, non-metallic element boron 1.1-1.2% and dysprosium 0.6-8% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements.