Industry News

King of the magnet

2018-05-11

NdFeB, known as“Magnetic King”, is famous in the empire of materials. It is made fromneodymium, iron, boron, and a small amount of added elements praseodymium , yttrium, ytterbium, aluminum and yttrium . The rare earth  magnet is   also called magnetic steel, which is the most cost-effective magnet material so far.

NdFeB permanent magnets have a large magnetocrystalline anisotropy field, high magnetic polarization, a theoretical magnetic energy product of 64 MGOe, its magnetic properties are more than 100 times higher than the magnetic properties of magnets used in the 19th century; 10 times higher than ferrite and Alnico; Doubles the expensive platinum-cobalt alloys. The material has high coercivity and energy density.

These excellent properties make NdFeB permanent magnets common used in modern industry and electronic technology, such as Permanent magnet motors, speakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment, etc.

Bonded NdFeB is mainly applicable to miniature size motors, while Sintered NdFeB is widely used in large and medium-sized motors, and Hot-pressed NdFeB is mainly used in the field of automotive EPS motors.

magnetic properties of the permanent magnet ferrite are lower, but it good at High resistivity, good stability, strong resistance to environmental changes, rich source of raw materials, high  cost performance, mature and simple technology, and no oxidation problem, compared to the metal permanent magnet. Therefore, it is widely used in low-end products including the motor components of automobiles, consumer electronics, home appliances, computers, and communication products.