Description of Ferrite Magnets

·        Ceramic magnets are also known as hard ferrites or ferrite magnets, one of the most cost-effective magnetic materials. Which are composed of primarily iron oxide, Fe2O3. The two common compositions are strontium ferrite,  SrFe12O19 (SrO•6Fe2O3), and barium ferrite BaFe12O19 (BaO•6Fe2O3).

Characters Of Ferrite Material

·        Least expensive material compared to alnico and rare earth magnets

·        High intrinsic coercive force

·        Available in simple shapes only due to manufacturing process

·        Lower service temperature than alnico, greater than rare earth

·        Finishing requires diamond cutting or grinding wheel

·        Lower energy product than alnico and rare earth magnets

·        The most common grades of ceramic are 1, 5, and 8 (1-8 possible)

·        Grade 8 is the strongest ceramic material available

·        Tooling can be expensive

Surface Treatments

·        No special surface treatments are required for Ferrite magnets since they are resistant to oxidation.