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.
