Rare Earth Magnets for High Heat Applications
The greatest advantage of high-temperature resistant magnets is that they can establish a strong magnetic field around them at high temperature without consuming their own energy. High-temperature resistant magnets have a wide range of applications. In various fields of modern science and technology, rare earth magnets play different roles.
1. Converting mechanical energy into electricity and applying it to the induction electromotive force of a conductor moving in a magnetic field. Such as receiver, generator, pickup, etc.
2. Converting electrical energy to mechanical energy, the application of current-carrying conductor through the magnetic field will be subject to the electric force. Such as electric loudspeakers, motors, electric headphones, magnetrons, cathode ray tubes, etc.
3. Converting one kind of mechanical energy into another kind of mechanical energy is based on the principle that magnets are equal to each other and opposite to each other. Examples of this type are electromagnets, electromagnetic conveyors, magnetic separators, etc.
4. Other special functions, including magnetized water, magnetic descaling, compass, magnetic therapy, etc.
The Curie temperature of common strong magnets is about 450 degrees Celsius ferrite, 320-380 degrees Celsius Nd-Fe-B magnet and 860-900 degrees Celsius Aluminum-Nickel-Cobalt magnet.
The common applications of high-temperature resistant magnets are listed here. Although the use of high-temperature resistant magnets involves many categories, loudspeakers, and other electro-acoustic devices are the main applications, followed by the magnet generators and voice coil motors, which account for about 60% of the magnetic material requirements.
The working temperature of 4 rare earth magnets
Ferrite magnet: 80 – 100℃, the high-temperature resistant model can reach 350 ℃;
NdFeB magnets: 60-200℃.
Samarium cobalt magnet: 250-350℃
Aluminum Nickel Cobalt Magnets: 450-900℃
We have developed a new magnet for high-temperature application!
Neodymium magnet is with much higher Br than any other magnets such as AlNiCo, SmCo, etc, but it also has a disadvantage, that its maximum working temperature and temperature stability are much worse than other magnetic materials, which directly restrict the wide application of Neodymium magnet in some special fields.
Usually, the temperature coefficient βHcj of Neodymium magnet is over -0.7%/℃, now we can supply new magnet less than -0.4%℃, this helps neodymium magnet with excellent temperature stability. Reversible temperature coefficient of Remanence( αBr) and Reversible temperature coefficient of Hcj is relative to the ratio of length, square, length/thickness diagram( BH CURVE), etc.
If you need a high-temperature magnet for some special applications, we are ready to support you, also will be your best choice.