Ferrite magnet, otherwise known as ceramic magnet or hard ferrite which is a type of high productivity permanent magnets made of Barium carbonate (BaCo3) or Strontium carbonate (SrCO3) and iron oxide. Ferrite block magnet is dark grey in color. Ferrite block magnet can be supplied in a wide range of dimensions and have always been a high cost performance option in many industrial and civilian areas. Large magnets, especially well known 6 in x 4 in x 1 in magnets, are widely utilized by magnetic separation application, then small size magnets are commonly used in various holding purpose, particularly magnetic door catch. Ferrite block magnet also has superior corrosion resistance and excellent temperature stability.
Ferrite Block Magnet Calculator
Notes:
- This calculator adapts to non-coating and non-chamfer magnet.
- Gauss value is based on Biot-Savart law and applicable to calculate gauss value of pole face’s geometric center.
- Surface gauss value decreased as the air gap increased, therefore, both encapsulation of hall component and neglected air gap have the significant role on the accuracy of gauss value. We recommend users set the air gap between 0.3 and 0.5mm.
- Measurement repeatability of surface gauss is relatively low even testing point is the geometric center. It must be pointed that surface gauss cannot represent the overall magnetic performance of the magnet in comparison with magnetic flux or magnetic moment.
- Air gap between magnet and steel plate in calculator is 0mm. In reality, even very small air gap will generate dramatic influence on the pull force in both theoretical calculations and the actual measurement.
- Besides magnet’s material, grade, and dimension, pull force is also impacted by steel plate’s material, composition, and surface condition. Steel plate should be thick enough to carry all magnetic flux or result in the low pull force owing to magnetic saturation.
- Above calculation results are only for reference.
