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Characteristics and Applications of Neodymium Magnets

May. 07, 2020

Customers and friends often ask such questions: What is the difference between Neodymium magnets and ordinary magnets?

The price of Neodymium magnets is often twice to more than three times the price of ordinary magnets.

These differences are mainly reflected in the characteristics of these two magnets. The magnetic field on the surface of the Neodymium magnet is too strong, exceeding the coercive force of the ferrite magnet. When the same pole is close, the ferrite is demagnetized and magnetized in the opposite direction. In the end, the same pole becomes a different pole, and it attracts.

In other words, if you use the N pole of the ferrite close to the N pole of the neodymium iron boron magnet, the N pole of the ferrite becomes the S pole when very close. But this is only partly close. It is worth reminding that when the neodymium magnet is far away, the N pole of the ferrite will return to the N pole, but the magnetism is weakened.

This happens because:

1) The coercive force of the ferrite magnet is not too high. If it is replaced with two pieces of neodymium iron boron or two pieces of ferrite, this will not happen.

2) The magnetic field near the Neodymium magnet surface is very strong.

As for the neodymium iron boron and the same ferrite, the suction force is large, and the opposite ferrite has a small suction force, which is also well understood. For anisotropic ferrite, Neodymium only demagnetizes a layer of ferrite on the surface, and it is still repulsive slightly deeper. The isotropic ferrite has a lot of magnetic moments that have not been magnetized, and the neodymium iron boron is obediently magnetized.

Cylinder Neodymium Magnet

Cylinder Neodymium Magnet

The application range of Neodymium magnet is as follows:

Electro-acoustic field: speakers, receivers, microphones, alarms, stage audio, car audio, etc.

Electronic appliances: permanent magnet mechanism vacuum circuit breaker, magnetic holding relay, watt-hour meter, water meter, sound meter, reed switch, sensor, etc.

Motor field: VCM, CDDVD-ROM, generator, motor, servo motor, micro motor, motor, vibration motor, etc.

Mechanical equipment: magnetic separation, magnetic separator, magnetic crane, magnetic machinery, etc.

Medical care: nuclear magnetic resonance instrument, medical equipment, magnetic therapy health care products, magnetized fuel economizer, etc.

Other industries: magnetized wax guard, pipeline descaler, magnetic fixture, automatic mahjong machine, magnetic lock, door and window magnet, stationery magnet, luggage magnet, leather magnet, toy magnet, tool magnet, craft gift packaging, etc.

As the third generation rare earth permanent magnet material, Neodymium magnet has high performance. With the development of knowledge economy represented by information technology, rare earth permanent magnet Neodymium industry and other functional materials continue to bring new uses. This Bring a broader market prospect for the Neodymium industry.

For more Neodymium magnet knowledge click here to view.

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