Ferrite Ring Magnets

Ι What Are Ferrite Ring Magnets?

Ferrite magnets, also known as ceramic magnets or hard ferrites, are non-metallic permanent magnets made from Iron Oxide (Fe₂O₃) combined with Barium Carbonate (BaCO₃) or Strontium Carbonate (SrCO₃) as the main raw materials. Produced through a powder metallurgy process, they are well known for their low cost, moderate magnetic properties, high resistance to corrosion, and good chemical stability, making them an excellent choice for applications where long service life and overall cost-effectiveness are important.

Ferrite ring magnets are one of the simplest and most widely used shapes in this family, featuring a round, flat form with a central hole. They are typically specified by outside diameter (O.D.), inside diameter (I.D.), and thickness (T), and can be supplied in both standard and custom sizes. Thanks to their stable performance and economical price, Ferrite ring magnets are used in many fields, including holding systems, permanent magnet motors, speakers, sensors, and other devices that require reliable magnetic components.

Magnetization Directions of Ferrite Ring Magnets

Ferrite ring magnets can be magnetized in several ways, most commonly axially or diametrically, with the pattern selected according to the application. Simple axially magnetized rings are widely used in loudspeakers and some holding systems, while axially multipole rings are often found in sensor devices.

Most diametrically multipole ferrite ring magnets are used in different types of permanent magnet motors, though some are also applied in sensing systems. For more specialized requirements, ferrite ring magnets can also be magnetized radially or with a skewed pattern to achieve specific magnetic effects.

Ι What Are Ferrite Ring Magnets?

Magnetization Directions of Ferrite Ring Magnets

Axial Magnetization

Axial Multipole Magnetization

Diametrical Magnetization

Diametrical Multipole Magnetization

Skewed Magnetization

Radial Magnetization