Ferrite magnet is a ceramic material which made by mixing and calcining large proportions of iron oxide (Fe2O3) blended with a certain proportion of Barium Carbonate (BaCO3) or Strontium Carbonate (SrCO3). Ferrite ring magnet also referred as ceramic ring magnet, is similar to ferrite disc magnet in outline, but with a plain hole inside it. Ring magnet should be dimensioned by the outer diameter (O.D.), inner diameter (I.D.), and thickness (T). In addition to frequently-used holding applications, the most representative application of ferrite ring magnet is undoubtedly the loudspeaker magnet.
Magnetic Moment Calculator of Ferrite Ring Magnet
Notes:
- For ferrite magnet, either magnetic moment or magnetic flux are more convincing in comparison with surface gauss value.
- Magnetic moment calculators adapt to non-coating and non-chamfer magnet.
- Recoil permeability μrecof ferrite magnet is between 1.05 and 1.10.
- The calculation results are merely for reference.
Multipole Ferrite Ring Magnet
Ferrite magnet can be classified to isotropic type and anisotropic type base on whether apply orientation magnetic field during compressing or not. Magnetic properties of anisotropic magnet are definitely higher than isotropic magnet. Besides conventional axially or diametrically magnetization, anisotropic ceramic ring magnet can also realize multipole magnetization in radial direction. Orientation magnetic field for anisotropic magnet is generated by direction current (DC) power supply. Multipole ring magnet should be machined to the true circle by regular polygon after sintering process.
