Rare Earth Magnets:
Rare Earth Magnets are including Neodymium(Nd)
-Iron(Fe)-Boron(B) types and Samarium(Sm)- Cobalt(Co)
classes. The most commonly produced material is neodymium-iron-boron
(NdFeB). This group of magnetic materials provides the highest available
magnetic energies of any material. NdFeB magnets allow small shapes
and sizes with high magnetic fields. Energy product range from 26
MGOe to about 45 MGOe.
Rare Earth Magnet----Sintered NdFeB magnets, have the characteristics
Br Resident induction.
relative to its high magnetic properties.
needed for NdFeB
Method: Type Information
Nickel, Nickel+Nickel, Copper+Nickel, Nickel+Copper+Nickel,
Epoxy, Nickel+Epoxy coating
Both NdFeB and SmCo are available in
sintered as well as bonded forms. Sintered NdFeB parts however,
will produce the highest magnetic properties. NdFeB is sensitive
to heat and should not be used in the environments that exceed 200.
Bonded NdFeB are generally low in properties due to the special
process of gluing the powder in a mold. The bonded form of the material
can be produced with close tolerance off tools with little or no
finishing required. The sintered form usually some finishing operations
in order to hold close mechanical tolerances.