Neodymium magnet, also known as NdFeB magnet, is a tetragonal crystal system made of Neodymium, iron and boron (Nd2Fe14B). In 1982, Sumitomo Special Metals' Misaki Sagawa discovered NdFeB magnet.The magnetic energy product (BHmax) of this magnet was greater than that of a samarium cobalt magnet, making it the largest material in the world at the time. Later, Sumitomo Special Metals successfully developed the powder metallurgy process and GENERAL Motors successfully developed a melt-spinning process to make Ndfeb magnets. The magnet is now the second most magnetic permanent holmium zero magnet and the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products, such as hard disks, mobile phones, earphones and battery-powered tools.
Ndfeb magnet is divided into sintered NDFEB and bonded NdFEB, bonded NDFEB is magnetic in all directions, corrosion resistance; And sintered Ndfeb due to corrosion, the surface needs to be coated, generally galvanized, nickel, environmental protection zinc, environmental protection nickel, nickel copper nickel, environmental protection nickel copper nickel. And sintered Ndfeb is generally divided into axial and radial magnetization, according to the required working face.
