Hard Ferrite Magnet, Strontium ferrite magnet, barium ferrite magnet

Ceramic magnets are sintered permanent magnets composed of Barium or Strontium Ferrite. This class of magnets, aside from good resistance to demagnetization, has the popular advantage of low cost.

Ceramic magnet has higher coercive force and higher resistance to be demagnetized and oxidized than other non-rare earth permanent magnets. so no need coating. But like most ceramics, they are brittle and should be handled carefully.

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, although some degree of greater magnetic strength will be found in the pressing dimension, usually the shortest dimension.