Permanent neodymium magnet ring is a rare earth permanent magnet annular structure with neodymium, iron and boron as the main components. Its core feature is the high-density sintered body composed of Nd₂Fe₁₄B compound with a specific crystal structure, and the crystals are preferentially arranged through a special orientation process. The ring-shaped geometric design optimizes the closed path of magnetic lines of force and forms a highly concentrated magnetic field distribution.
Compared with traditional ferrite or aluminum nickel cobalt magnets, the energy density of permanent neodymium magnet ring is essentially different. This is due to the inherent high saturation magnetization and magnetocrystalline anisotropy of neodymium iron boron compounds. Its crystal structure forms a stable magnetic domain arrangement direction at the microscopic level, giving the material extremely high coercive force.
The manufacturing process has a decisive influence on the magnetic properties of permanent neodymium magnet ring. The strong orientation magnetic field applied during the powder metallurgy sintering process forces all crystal easy magnetization axes to be arranged along the set direction, forming a macroscopic uniaxial anisotropy. This highly consistent magnetic moment orientation enables the effective magnetic moment per unit volume to reach its maximum value, significantly surpassing the disordered magnetic domain distribution pattern of ordinary magnet polycrystalline structures.
