Isotropic polymer bonded SmFeN magnets
Sm-Fe-N magnet powders are produced in a similar way to Nd-Fe-B, except that nitrogen is introduced by heat treatment of rapidly quenched Sm-Fe flakes in a nitrogen atmosphere. These flakes are then mixed with a polymer binder and pressed or injected to make isotropic bonded magnets.
Magnetic performance of (BH)max=112 kJ/m3 is at the highest level in the world and has excellent corrosion and heat resistance, which opens the door to various new applications.
Features of Isotropic polymer bonded SmFeN magnets
Provided by MPCO’s original manufacturing technique
Highest magnetic properties among all isotropic bonded magnets
(BH)max exceeding NdFeB bonded magnets, 98 ～ 112 kJ/m3
Excellent corrosion resistance
Possible to use without coating in certain application environment
Excellent heat resistance
Thermal coefficient of remanence -0.05 %/deg C ～ -0.07 %/deg C (-20 ～ +120 deg.C.)
Better than NdFeB bonded magnets
Magnetizing field requirement
Magnetizing field required for near saturation is 2400 kA/m (30 kOe), which is higher than for Isotropic polymer bonded SmFeN magnets.
Technical support for magnetizing, such as multiple pole magnetization is available on request.
Applications of Isotropic polymer bonded SmFeN magnets
Taking advantage of higher magnetic properties and better corrosion / heat resistance than Nd-Fe-B bonded magnets, Isotropic polymer bonded SmFeN magnets can be used for a variety of applications, such as immersible pumps, cell phones and sensors.