Ceramic

About Ceramic Magnets

Ceramic magnets, also known as hard ferrites or ferrite magnets, were developed in the 1950s. Although their maximum energy product (BH)max is only 1 to 4 MGOe, which is lower than other permanent magnets, Ceramic magnets have found many applications due to their attractively low price.

Key features of Ceramic magnets include:

  • Least expensive magnets due to inexpensive raw materials and processes
  • Very high electrical resistivity (around 106Ohm-cm)
  • Positive reversible temperature coefficient of intrinsic coercivity

 

 

 

 

 

Ceramic Magnetic Properties

Ceramic Mechanical Properties

Additional Information

Ceramic magnets can be either isotropic or anisotropic. Isotropic ceramic magnets can be magnetized in any direction while the anisotropic ceramic magnets can only be magnetized through the easy axis (magnetization direction). Ceramic magnets have good resistance to demagnetization, excellent thermal stability, and superior corrosion resistance. They are an excellent choice, because of low cost and abundance of raw materials, for many applications including loudspeakers, DC motors, magnetic separators, sensors, reed switches, and holding devices.

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