Ferrite Permanent Magnets are Composed of Strontium carbonate and iron oxide. They are charcoal gray in color and usually appear in the forms of discs, rings, blocks, cylinders, and sometimes arcs for motors.
Manufacturing Ferrite Permanent Magnets:
A powdered mixture of strontium carbonate and iron oxide is injected into either a wet press or dry press for forming. During this pressing process, a magnetic field is applied in the direction of preferred magnetization to orient the material and increase the magnet's performance potential. This magnet is considered "oriented". If not exposed to a magnetic field at time of formation, it is called "non-oriented" (Isotropic).After the molding process, the material is then sintered at about 1010OC. This process is similar to that of kilting ferrite pottery, thus the popular name "Ferrit" magnet.Lastly, the magnet is finish-ground to size with a diamond-bladed grinding wheel, magnetized, and inspected for shipment.