Current Situation Of Rare Earth Permanent Magnet Material

Now rare earth permanent magnet material has been important material in electronic communication technology. It is widely used for the man-made satellite, radar and other aspects of the traveling wave tube, micro motor, micro recorder, aviation equipment, electronic watches, seismic instrument and the other electronic instruments. At present, rare earth permanent magnetic has entered into automobile, household appliances, electronic instruments, magnetic resonance imaging, audio equipment, micro motor and mobile phone industries. Magnetic acupoint adopt rare earth permanent magnetic material in medical field.

There are many preparation process of rare earth permanent magnet material. Such as sintered magnets prepared by powder metallurgy sintering process, Reduction diffusion milling, made the hot deformation magnet into powder and preparing anisotropic bonded magnets by mold pressing or injection method.

Recent years, rare earth permanent magnetic material developed very quickly in China. Neodymium iron boron magnet made by Chinese are mainly used for audio devices. The second is the motor and oil well paraffin remover. However the largest amount of field abroad, such as voice coil, motor. They have been little application in China. Because voice coil and motor require high magnetic properties. These two industries need high precision machining and good coating quality.