Magnet Shape: Disc / Disk / Round
Material: Hard Ferrite (Ceramic)
Coating: No Coating
Grade(Chinese Stardard): Y35
Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 4.3-4.5 KGs (mT): 430-450 mT
Intrinsic Coercivity Force (Hcj): 2.70-3.00 KOe 215-239 KA/m
Coercivity Force (Hcb): 2.73-3.03 KOe 217-241 KA/m
Energy Density (BH)max: 4.1-4.8 MGOe 33.1-38.2 KJ/m³
Operating Temperature: -40 °C to +250 °C
Magnetisation Direction: Axial / Radially magnetized
Size (Can be customized according to customer drawings):
Outside Diameter(D): 20 mm
Thickness(T): 1.5 mm
Tolerance: +/-2% mm
Delivery time 7-25 days
Measurements
Machining and tolerances
Ceramic magnets are very hard and brittle, consequently machining must be done with a diamond wheel, and is easier when done prior to magnetization. Standard tolerances for ceramic magnet dimensions are +/-.005" for ground dimensions and +/- 2% of feature size for as sintered dimensions. Because of their brittleness these magnets will not withstand impact or flexing. We recommend that they not be used for structural purposes. Ceramic magnets are chemically inert non-conductors, which is a benefit in many applications. However, this feature does eliminate the use of the EDM process to produce samples or special shapes.
Temperature constraints and methods of magnetization
Maximum operating temperature for a ceramic magnet is 250°C. Although you will experience magnetic losses when operating at elevated temperatures, the losses are recovered when the material is brought down to normal ambient temperature. However, operating in very cold temperatures (-20°C) can result in permanent losses of magnetic strength unless the circuit has been designed for such extremes.
Magnetization: ceramic magnets must be magnetized in the direction of orientation, which is the same as the direction of pressing.
