Ferrite magnets have been commercially available since the 1950’s. They were originally called Ceramic magnets because of their electrically insulating properties they are a great insulator and their production method. They are better known today as Ferrite magnets but their correct title should be hard Hexagonal Permanent Magnets.

Properties of Ferrite Magnets

• Ferrite magnets generally comes in a dark black color.
• Ferrite magnets are relatively strong magnets, but not as strong as Neodymium magnets, Ferrite magnets are more cost-effective magnets than the Neodymium magnets.
• Ferrite Magnets have high coercivity, meaning they are resistant to demagnetization and retain their magnetism better than the Neodymium magnets.
• Ferrite magnets have a high Curie temperature, typically around 450-500°C, if they get heated to more than the recommended temperature they lose their magnetic properties.
• Ferrite magnets do not rely electricity, they are a good insulator, making them suitable for applications where electrical conductivity is a concern.
• Ferrite magnets have good corrosion resistance and are less prone to oxidation.
  
  

Ferrite magnets are very good for electric motors and generators where it is still an extremely popular magnet. Ferrite magnets are often extremely low cost, due to the ease of processing and the low cost of raw materials. As a result, they are one of the most widely used permanent magnet in the world.

The magnets are made by a powder metallurgy processing route and there are no problems with oxidation of the powder during processing, as the material is already a stable oxide.

Please be aware the material discussed here is ferrite permanent magnets – they are not the same as ferrite cores used in transformers. Ferrite magnets retain their magnetism; transformer ferrites only have magnetism when an electrical current passes through the surrounding coil which disappears when the current is turned off – they work in completely different ways.

Ferrite magnets can be produced in many shapes and sizes. The main shapes are blocks, discs, rings, arcs, and rods. Other shapes may be possible upon request.