Hard Ferrite
Hard Ferrite magnets (ceramic magnets),composed
of Barium or Strontium,are sintered magnet material
and manufactured by pressing, sintering, or injection
molding.These magnets can be both anisotropic and isotropic.
This class of magnets has good resistance
to demagnetization and especially popular advantage
of low cost. However,They are very hard,brittle and
should be machined in an unmagnetized state with specialized
machining techniques.This class of magnets have lower
energy characteristics compared to other magnetic materials.
The corrosion resistance of Ferrite
is considered excellent , and no surface treatments
are required. However, Ferrite magnets may have a thin
film of fine magnet powder on the surface and for clean,
non-contaminated applications, some form of coating
may be required.
Due to their low cost, Ferrite magnets
enjoy a very wide range of applications, from motors
and loudspeakers to toys and crafts,and are the most
widely used magnet material today.
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