Sintered Ndfeb Magnet
Sintered NdFeB Magnets are the most powerful magnets known. Maximum allowed temperature varies, but is up to 240°C for some grades. This maximum temperature is important, because usually the price of the magnet increase with temperature.
The magnets consists of powder compacted in a magnetic field therefore they have process-fixed and limited magnetizing directions. Usually the magnetic field-lines have to be parallel in the material.
Highest magnet strength available
High resistance to demagnetization
Operating temperature up to 240oC
Good at withstanding low temperatures (down to – 100oC)
Corrosion protection is however always recommended for sintered neodymium magnets, because of the materials low corrosion resistance. The corrosion resistance of Sintered Ndfeb Magnets can be compared to pure untreated iron.
A range of different coatings are available but sometimes complete encapsulation in i.e. stainless steel is preferable.