As important parts of magnetic materials, hard ferrite (ceramic) magnets play an important role
in electrical engineering, electronic information, car, motorcycle industries etc. They are also widely used
in medical treatment, mining and metallurgy, industrial automation, oil energy and civil industries.
Ceramic magnets are composed of iron oxide, barium and strontium elements. This class of
magnets has a higher magnetic flux density, higher coercive force, and higher resistance to
demagnetization and oxidation compared to other non-rare earth permanent magnets.
The biggest advantage of such magnets is the low cost, which makes the hard ferrite magnets very
popular in many permanent magnet applications. Due to their ceramic nature, ferrite magnets are
very hard and brittle. Special machining techniques must to be utilized for these magnets.
The working temperatur of ceramic magntes is between the working temperatures of NdFeB magnet and
SmCo/AlNiCo magnets. They have lower energy than NdFeB, SmCo and alnico magnets.
Ceramic or hard ferrite magnets come in discs, cylinders, rings, blocks,arcs/segment, ball and ellipses etc.
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