Neodymium iron boron magnets (NdFeB)
The high-energy magnets consisting of neodymium, iron and boron are characterized among other things by the fact that they can be used in a space-saving way. masetec offers a large selection of NdFeB magnets.
Use of NdFeB magnets
NdFeB magnets are particularly suitable for sensor technology or in electric motors and generators due to their stable and high magnetic effect at low heat development. They are even used in wind power plants. One reason for using NdFeB magnets is their high holding strength, even with small sizes, and their low cost. This saves space and money.
Design of NdFeB magnets
NdFeB magnets consist of neodymium, iron and boron. The excellent magnetic properties and low-cost production possibility of this compound was discovered in the 1970s.
Production of NdFeB magnets
The components of NdFeB magnets are finely ground and pressed under the influence of a strong magnetic field. Sintering stabilizes the magnetic effect. The strength of the magnet is determined by the energy density. Due to the occurrence of the raw materials, most of the NdFeB magnets are manufactured in Asia.
Coatings on NdFeB magnets
NdFeB magnets are coated with nickel and copper or nickel and gold. An additional surface coating with zinc or nickel provides for a higher corrosion resistance.
Magnet selection guide
| LOW | HIGH | |||
Energy product | Ferrite | AlNiCo | SmCo | NdFeB |
Costs | Ferrite | AlNiCo | NdFeB | SmCo |
Max. Operating Temperature | NdFeB | Ferrite | SmCo | AlNiCo |
Corrosion Resistance | NdFeB | SmCo | AlNiCo | Ferrite |
Resistance to demagnetization | AlNiCo | Ferrite | NdFeB | SmCo |
Mechanical strength | Ferrite | SmCo | NdFeB | AlNiCo |
Temperature coefficient | AlNiCo | SmCo | NdFeB | Ferrite |
Advantages Neodymium and NdFeB
- Exceptionally high energy density at room temperature
- Considerable coercivity
- Especially stable against demagnetizing fields
Caution with NdFeB magnets
- For use in humid or aggressive atmospheres, a coating is indispensable as corrosion protection
- Not unlimited temperature stability
- High temperature coefficient
Safety Instructions
Here you can find out what you have to pay attention to when handling magnets – just download the pdf file.
Selection Guide Magnets
Our practical information sheet will help you select the right magnets.
