Magnet Shape: Ring / Tube
Material: Hard Ferrite (Ceramic)
Coating: No Coating
Grade(Chinese Stardard): Y33
Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 4.1-4.3 KGs (mT): 410-430 mT
Intrinsic Coercivity Force (Hcj): 2.76-3.14 KOe 220-250 KA/m
Coercivity Force (Hcb): 2.83-3.20 KOe 225-255 KA/m
Energy Density (BH)max: 3.9-4.4 MGOe 31.5-35.0 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): 30 mm
Inner Diameter(d): 16 mm
Thickness(T): 8 mm
Tolerance: +/-2% mm
Delivery time 7-25 days
Measurements
Hard ferrites
In contrast, permanent ferrite magnets are made of hard ferrites, which have a high coercivity and high remanence after magnetization. These are composed of iron and barium or strontium oxides. The high coercivity means the materials are very resistant to becoming demagnetized, an essential characteristic for a permanent magnet. They also conduct magnetic flux well and have a high magnetic permeability. This enables these so-calledceramic magnets to store stronger magnetic fields than iron itself. They are cheap, and are widely used in household products such as refrigerator magnets. The maximum magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30 to 160 kiloampere turns per meter (400 to 2000 oersteds). The density of ferrite magnets is about 5g/cm3.
