NdFeB magnets are tetragonal crystals formed of neodymium, iron, and boron (Nd2Fe14B). In 1982, Masato Sagawa of Sumitomo Special Metal discovered a neodymium magnet. NdFeB is the most powerful permanent magnet in contemporary magnets. Its magnetic energy product (BHmax) is 5-12 times that of ferrite magnets and 3-10 times that of aluminum nickel cobalt magnets; its coercive force is equivalent to The ferrite magnet is 5-10 times and the aluminum-nickel-cobalt magnet is 5-15 times. Its potential magnetic performance is extremely high. It can absorb a weight equivalent to 640 times its own weight. It is the largest magnetic energy product in the world. Later, Sumitomo Special Metals successfully developed the powder metallurgy process, and General Motors successfully studied the melt-spinning process, which can produce NdFeB magnets. This magnet is the most powerful permanent magnet today and the most commonly used rare earth magnet.

Curie temperature:
The Curie temperature of Ferrite magnet is 465℃,
The Curie temperature of Alnico magnet is 800℃,
The Curie temperature of SmCo magnet is 700-800℃,

The Curie temperature of NdFeB magnet is 320℃-460°C