Magnet Shape: Irregular / Special-Shaped / Allotype
Material: Hard Ferrite (Ceramic)
Coating: No Coating
Grade(Chinese Stardard):         Y36

Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 4.3-4.5 KGs (mT):  430-450 mT
Intrinsic Coercivity Force (Hcj):    3.10-3.40 KOe    247-271 KA/m
Coercivity Force (Hcb):              3.14-3.44 KOe    250-274 KA/m
Energy Density (BH)max:              4.4-4.8 MGOe     35.1-38.3 KJ/m³
Operating Temperature:               -40 °C to +250 °C
Magnetisation Direction: Axial / Radially magnetized
Size:
Outside Diameter(R), Inner Diameter(r), Width, Height, Thickness (Custom design data)
Tolerance:         +/-2% mm
Delivery time           7-25 days
When Ferrite magnets get hotter, their high intrinsic coercivity actually improves (improving resistance to demagnetisation) making them extremely popular in motor and generator designs and also in loudspeaker applications (only ferrite magnets become noticeably more resistant to demagnetisation when heated). Ferrite magnets have a positive temperature coefficient of Intrinsic Coercivity (it changes by +0.27 %/deg C from ambient) and only ferrite shows this amount of this characteristic. However the magnetic output does fall with temperature (it has a negative temperature coefficient of Induction of -0.2 %/degC from ambient). The end result is that Ferrite magnets (ceramic magnets) can be used at high temperature with very few issues.