The application range of NdFeB magnets is as follows:
Electroacoustic 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, micrometer, reed tube, sensor, etc.
Motor field: VCM, CDDVD-ROM, generators, motors, servo motors, micro motors, motors, vibration motors, etc.
Mechanical equipment: magnetic separation, magnetic separator, magnetic crane, magnetic machinery, etc.
Healthcare: MRI machines, medical devices, magnetic therapy health care products, magnetized fuel savers, etc.
Other industries: magnetized wax preventer, pipeline descaler, magnetic fixture, automatic mahjong machine, magnetic lock, door and window magnetic, stationery magnetic, luggage magnetic, leather magnetic, toy magnetic, tool magnetic, craft gift packaging, etc.
The third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet among contemporary magnets. Its BHmax value is 5-12 times that of ferrite magnets and 3-10 times that of alnico magnets; Its coercivity is 5-10 times that of a ferrite magnet and 5-15 times that of an Alnico magnet, and its potential magnetic properties are extremely high, allowing it to pick up weights up to 640 times its own weight.
Because the main raw material of NdFeB magnets is very cheap, the reserves of rare earth neodymium are 10-16 times more than that of samarium, so its price is much lower than that of samarium cobalt magnets.
NdFeB magnets have better mechanical properties than samarium cobalt magnets and alnico magnets, making them easier to cut and drill and process complex shapes.
The disadvantages of NdFeB magnets are their poor temperature performance, large magnetic loss when used at high temperatures, and low maximum operating temperatures. Generally, it is about 80 degrees Celsius, and the maximum working temperature can reach 200 degrees Celsius in specially treated magnets.
Because the material contains a large amount of neodymium and iron, it is prone to rust and one of its major weaknesses. Therefore, the NdFeB magnet must be surface coated. Nickel (Ni), zinc (Zn), gold (Au), chromium (Cr), epoxy resin (Epoxy) and so on can be electroplated.
NdFeB magnets are widely used in aerospace, electronics, electromechanical, instrumentation, medical and other fields. And it is also more and more widely used in non-technical fields, such as adsorption magnets, toys, jewelry, etc.