Ceramic Magnets

Ceramic (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


Attributes of Ceramic Magnets

•    High intrinsic coercive force
•    Tooling is expensive
•    Least expensive material compared to alnico and rare earth magnets
•    Limited to simple shapes 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
•    Most common grades of ceramic are 1, 5 and 8 (1-8 possible)
•    Grade 8 is the strongest ceramic material available

Applications of Ceramic Magnets

Speaker magnets, DC brushless motors, Magnetic Resonance Imaging (MRI), Magnetos used on lawnmowers and outboard motors, DC permanent magnet motors (used in cars), Separators (separate ferrous material from non-ferrous), Used in magnetic assemblies designed for lifting, holding, retrieving, and separating.


Typical Magnetic and Physical Properties of Ceramic Magnet Material