The material is composed of Iron Oxide, Strontium or Barium, and other materials added. Ferrite magnets are very popular and widely used because of their excellent resistance to demagnetizaion, corrosion, and their low cost.
Ferrite magnets are manufactured by pressing or sintering. These magnets can be both anisotropic and isotropic. Anisotropic grades are oriented in the manufacturing direction and must be magnetized in the direction of orientation. Isotropic grades are not oriented and can be magnetized in any direction.
The basic shape is given by the mold, like segment, disc, ring, rod, bar and block. After pressing the magnet will be sintered, then cut, ground and/or drilled, finally magnetized if desired. The material can withstand corrosion to a great extent. Ferrite magnets have an excellent price – quality ratio.
This class of magnet is very hard, brittle and performs lower energy characteristics compared to other magnetic materials.
Temperature Effects: The magnetic properties remain nearly constant in the temperature range of –40°C to + 250°C. Versus high temperature the magnetic force will decrease.
Applications: Hard ferrite (ceramic) magnets have a wide application range. The most common used applications are:
electrical motor, loudspeaker, sensor, holder, separation, etc.
Data Sheets: Hard Ferrite.