Neodymium Magnets: Introduction

Neodymium permanent magnets (NdFeB) are made of Neodymium, Iron and Boron. They are from the Rare-Earth magnet family and have the highest magnetic energies of any material available today. Grades up to N53 with 15,000 Gauss (1.5 Tesla) are available. NdFeB magnets can now be used at operating temperatures up to 220C.

In addition to magnetic holding applications, Neodymium magnets are used in brushless DC motors, contactless sensors, medical devices, magnetic resonance imaging equipment, wind turbines, generators, electric vehicles, and many types of electronic devices.

There are three types of Neodymium Magnets: Sintered Neo, Bonded and Hot-pressed.

Sintered NdFeB

Sintered Neodymium magnets produce the highest magnetic properties. However, the complexity of the shape and magnetic field configuration is limited. Sintered Neodymium magnets are brittle and also sensitive to heat and corrosion. Therefore, careful consideration should be given to temperature and protective coating requirements.