Electroacoustic field: loudspeaker, receiver, microphone, alarm, stage sound, car sound, etc.
Electrical appliances: permanent magnet vacuum circuit breaker, magnetic retaining relay, electric energy meter, water meter, microphone, dry spring tube, sensor, etc.
Motor field: VCM, CDDVD-ROM, generator, motor, servo motor, micro motor, motor, vibration motor, etc.
Mechanical equipment: magnetic separator, magnetic crane, magnetic machinery, etc.
Medical care: magnetic resonance instruments, medical devices, magnetic health care products, magnetized energy-saving devices, etc.
Other industries: magnetized wax preventer, pipe descaling device, magnetic fixture, automatic mahjong machine, magnetic lock, door and window magnetism, stationery magnetism, box magnetism, leather magnetism, toy magnetism, tool magnetism, gift packaging, etc.
The third generation rare earth permanent magnet NdFeB is the strongest permanent magnet material in the contemporary permanent magnet materials. Its BHmax value is 5/12 times that of ferrite magnet and 3 times that of Al-Ni-Co magnet. Its coercivity is 5-10 times that of ferrite magnet and 5-15 times that of Al-Ni-Co magnet. Its potential magnetic properties are very high and it can absorb 640x of its own weight.
Because the main raw materials of NdFeB magnets are very cheap and the storage of rare earth Nd is 10-16 times that of samarium, the price of NdFeB magnets is much lower than that of Nd-Co magnets.
NdFeB magnets have better mechanical properties than samarium-cobalt magnets and Al-Ni-Co magnets, and are easy to cut, drill and process complex shapes.
NdFeB magnet has some shortcomings, such as poor temperature performance, high temperature magnetic loss and low maximum operating temperature. Generally at about 80 degrees Celsius, after special treatment of magnets, its maximum operating temperature can reach 200 degrees Celsius.
Because the material contains a large amount of neodymium and iron, easy corrosion is also a major weakness. Therefore, the NdFeB magnet must be coated on the surface. Nickel (nickel), zinc (zinc), gold (gold), chromium (chromium), epoxy resin (epoxy resin) can be electroplated.
NdFeB magnets are widely used in aerospace, electronics, electromechanical, instrumentation, medical and other fields. Non-technical applications, such as magnets, toys, jewelry and so on, are becoming more and more widespread.
Production process: ingredients, smelting, powder making, forming, sintering, testing, mechanical processing, electroplating, magnetization, inspection, packaging.
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