Ferrite magnets correspond to any ceramic material in terms of hardness and brittleness and can only be machined with diamond tools. As a ceramic material, hard ferrite magnets are resistant to weathering and to many chemicals such as solvents, alkaline solutions, salts, weak acids, lubricants and harmful gases. Hard ferrites are the most inexpensive and most widely used permanent magnets worldwide. A rise in temperature per 1 °C leads to a reduction in the flux density by 0.2% while the coercivity increases by 0.3% at the same time. A reduction in temperature increases the flux density and lowers the coercivity by the same amount.

The design of hard ferrite magnets always requires a large magnetic pole area with small thickness in the direction of magnetisation. The ratio between magnet length and magnet diameter for a magnetic disc can be estimated here.

The following standard magnets are generally available at short notice from stock. Circular rod magnets with other dimensions in the diameter range from 3 to 20 mm are available for volume applications (Request form).

All dimensions in mm. H = direction of magnetisation