New application of the radial multipole magnetic hard ferrite ring A new application of the radial multipole magnetic hard ferrite ring: the ring whose magnetic flux densit is sine wave shape on the surface, is made by new technology. Its magnetic property can reach about 210mT. Using

Hard ferrite magnets are manufactured from iron oxide and either barium carbonate or strontium carbonate. The raw materials are mixed in the correct proportions, granulated, and calcined (presintered). After going through several intermediate phases, a hexaferrite phase (BaFe12O19 or SrFe12O19) is a

The polar asnisotropic ferrite magnets are the magnets with multipoles in ring shape. They have become the key componnet of stepping motors which are widely used in motors, micro motors DC motors and other new generation of permanent magnet motors.