Features:

Composed of strontium carbonate and iron oxide

Least expensive material compared to alnico and rare earth magnets

High-intrinsic coercive force

Simple shapes (only due to manufacturing process) are available

Lower service temperature than alnico and greater than rare earth

Finish 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 to 8 possible)

Grade 8 strongest ceramic materials are available

Applications:

Speaker magnets, DC brushless motors, magnetic resonance imaging (MRI), magnetos used on lawn mowers and outboard motors, DC permanent magnet motors (used in cars), separators (separate ferrous material from non-ferrous), magnetic assemblies designed for lifting, holding, retrieving and separating