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Properties and Application of Rare Earth Permanent Magnetic Materials
Feb 02, 2018

Comprehensive analysis, rare earth permanent magnet material has many advantages, so far, the material belongs to the highest comprehensive performance known as a permanent magnet material. It generally has the features of high remanence, high coercivity and high energy product, and the demagnetization curve of rare earth permanent magnet is basically a straight line. The recovery line coincides with the demagnetization curve, and the reversible permeability is close to 1.0.

 

In practice, due to the rare earth permanent magnet material has a strong temperature resistance, so its operating temperature up to 300 ℃, with good temperature stability. So, at present, this material can be mainly applied to what areas? First of all, the material has a wide range of applications in electrical engineering. Since rare earth permanent magnets do not have excitation loss and no heat, the volume and the mass of the motor made of this material, that is, the rare earth permanent magnet motor, are greatly reduced, and the electrode efficiency and the torque can be increased.

 

Second, rare earth permanent magnet materials also play an important role in the computer field. In the 1980s, the advent of neodymium-iron-boron, known as the "magnet of permanent magnetism", which represented the highest performance of today's magnets, had a positive impact on the miniaturization of the computer industry. In addition, the material is also used in printers for computer data output.

 

In addition, rare earth permanent magnet materials also play an important role in various electro-acoustic devices. The study found that about 15% of the material used in the manufacture of various types of audio, video and other electro-acoustic devices. Its audio applications include speakers, headphones and so on. After use, speakers can be miniaturized, thin and light, and increased sensitivity.

 

In addition to these applications, in fact, rare earth permanent magnet materials are also widely used in microwave communication technology, magnetic separation technology and instrumentation and timing devices. In addition, rare earth permanent magnet materials in the magnetic machinery applications, in transportation engineering applications and in the medical and fitness equipment applications are also more and more widely.

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