Ferrite Block Magnet 

Ferrite Block magnets, also known as ceramic magnets, were developed in the 1960’s as a low cost 

alternative to metallic magnets.Ferrite magnets have won wide acceptance due to their excellent 

corrosion resistant and good resistance to demagnetization. Despite their relatively low energy output,

 ferrite magnets’ popularity is largely from its low price. It is the first choice for most automotive sensors, 

MRI machines, DC motors, and magnetic separators. In fact, based on weight,it is the most widely 

used permanent magnet available today.

Charcteristics 
Ferrite magnets are very hard and brittle. Like all magnetic materials, ferrite magnets should not be 

used as a structural element in your design. Ferrite magnets are prone to cracking if your application

 requires regular impact or flexing. Because ferrite magnets offer good corrosion resistance, 

they do not require an outer coating. In rare instances a thin outer coating

 is applied simply to protect the material.

Fairly strong magnetic power (Power-Index(1) = 4~5)
Most common used magnet with low cost (Cost-Index(2) = 1~3)
Isotropic & Anisotropic available
Produced by powder metallurgical engineering with chemical composition of Ba/Sr O.6 Fe2O3
Very brittle & relatively hard
Good resistance to demagnetization
Good temperature stability
Oxided to saturation with excellent corrosion resistance

Service temperature greater than rare earth and lower than alnico

Finishing requires diamond cutting or grinding wheel
Energy product lower than alnico and rare earth magnets

• Tolerance L: + 0.6 / - 0.6 mm
• Tolerance W: + 0.4 / - 0.4 mm
• Tolerance H: + 0.5 / - 0.2 mm

Applications of Ceramic Magnets
• Speaker magnets
• DC brushless motors
• Magnetic Resonance Imaging (MRI)
• Magnetos used on lawn mowers, outboard motors
• DC permanent magnet motors (used in cars)
• Separators (ferrous material from non-ferrous)
• Used in magnetic assemblies designed for
lifting, holding, retrieving and separating

Regarding of magnetic properties of Ferrite Magnet, Please click here.

For your different application,different grade/series for your choice.

UNMAG are supplying Ferrite magnets applied in various industrial applications. We have advanced technology, 

rich experience, and professional engineering technicians in this field.