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0.25 x 0.281 ceramic disc magnet CD002500C


Powerful, economically priced and differing strengths...
To see size and information charts of all our magnets please click below:
Magnetic Material Charts and Information
Ceramic (ferrite) 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.
This listing is for one (1) magnet.
Applications of Ceramic Magnets
* 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
Attributes of Ceramic 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
* Most common grades of ceramic are 1, 5 and 8 (1-8 possible)
* Grade 8 is the strongest ceramic material available
* For as pressed material, tolerance on the thickness (direction of magnetization) is ± .005. Other dimensions are ± 2.5% or ± .010, whichever is greater. According to IMA standards, visual imperfections such as hairline cracks, porosity and minor chips are commonly found in sintered metallic magnets. A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of pole surface.
* Ceramic magnet material is extremely brittle and can chip or break if dropped on a hard surface, or if allowed to “jump at” an attracting object. Handle with care. The weakest grade of ceramic material is grade 1, which is typically non-oriented. Grades 5 and 8 are oriented ceramic material. Grade 8 is the strongest ceramic magnet material available (Refer to properties chart below). When making magnetic assemblies with ceramic, it is typically easier for production purposes to magnetize the product after assembly.
* Since ceramic material is so brittle, it requires special machining techniques and equipment. We are fully equipped to cut and grind ceramic material to your specifications.



0.25 x 0.281 ceramic disc magnet CD002500C