The ndFeb is divided into sintered NdFeb and bonded NdFeb.

Sintered NdFeb is an anisotropic magnet produced by powder sintering. Generally after sintering can only produce blank, and then after mechanical processing (such as wire cutting, slicing, grinding, etc.) to become various shapes of magnets. Sintered NdFeb is a hard and brittle material that is difficult to be machined. During the processing, it has high loss, high cost, poor dimensional accuracy and poor corrosion resistance. The surface needs electroplating treatment, generally including galvanizing, nickel, environmental zinc, environmental nickel, nickel copper nickel, environmental nickel copper nickel and so on. Sintered NdFeb is generally divided into axial and radial magnetization, which can be determined according to the required working face. But the advantage is high performance, currently has achieved more than 50M.

Bonded NdFeb is the ndFeb powder with permanent magnetic properties (usually made by fast quenching or HDDR method), mixed with an adhesive (such as epoxy resin, nylon or rubber), and then directly formed in the mold, or calendered, and then cured to become a permanent magnetic binding. Its characteristic is that the final size of magnet can be obtained without mechanical processing, which can save material. High dimensional precision, suitable for mass production. In addition, corrosion resistance is better than sintered magnets. The disadvantage is that the magnetic property is low, the highest performance of the isotropic bonded magnet is only one fifth of the sintered NdFeB Magnet.

Bonded ndfeb magnet market although started late, but the market growth is rapid. Compared with sintered NdFeb magnet, bonded NdFeb magnet has obvious Advantages in dimension precision, production cost and stability. With the development of miniaturization and miniaturization of electronic devices, their application fields will be expanded continuously. Market demand is growing steadily. Hard disk drive market growth is stable, automotive micromotor market and mobile vibration motor market penetration continues to increase, to ensure the bonded NdFeb magnets market demand for rapid growth; The expiration of MQ magnetic powder patent and the emergence of new technologies such as anisotropic bonded NdFeb magnet have laid a reliable foundation for the future development of bonded NdFEB magnet.