The maximum temperature of injection molding magnet depends on the magnetic powder and binder. For example, ferrite powder combined with nylon 6 or PPS can be tested at 180℃. However, nylon 12 melts when the temperature is above 170℃, so nylon 12 is not recommended if the designed operating temperature of the magnet exceeds 150℃.
Take ndfeb magnetic powder with high magnetic energy storage as an example. If its intrinsic coercivity is 9500 ohst (760kA/m), no matter which binder is used, when the temperature exceeds 120℃, the magnetic characteristics of the material will show significant irreversible loss.