Processing Ceramic /
Sintered Hard Ferrite Magnets
Processing begins with granulation or drying of the ferrite powder raw material
before axial pressing to form compacts of the required shape.
Isotropic hard ferrite magnets are produced by dry pressing of granulated
ferrite raw material using mechanical or hydraulic presses. Anisotropic magnet
properties are achieved by pressing in a magnetic field. In this case, pressing
may be carried out using dry powder or wet slurry dependent upon the level of
anisotropic properties required. Specially designed electromagnetic tools are
employed to produce the anisotropic grades. With all pressing techniques,
continuous in-process monitoring techniques ensure consistent green density is
maintained on all products.
After pressing the compacts are sintered in air at high temperature to
consolidate them, thereby giving their definitive shape and strength.
Grinding and/or other finishing operations can be used to achieve very close
dimensional tolerances if necessary.
Components may be magnetized before final inspection, packing and despatch.
EAM’s knowledgeable product development team will assist you
in choosing the optimal combination of binder and magnet
material for your specific application.