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Ferrite Magnets

Ceramic Ferrite Magnets is a good choice when comparing cost with other type of magnets as they are inexpensive, moderate in magnetic strength, and easily magnetized in a variety of formats. Generally they do not require a coating or plating magnets because of good corrosion resistance property. Its high Intrinsic Coercive Force (Hci) and low cost makes Ceramic magnets a popular choice for electromechanical applications. While we have to mention the ferrite magnets should not be exposed to heating or cooling rates greater than 200°F per hour.

 
Ceramic ferrite magnets manufacturing process
 
Here below is the sintered ferrite and rubber ferrite magnet manufacturing process distinguished by wet method and dry method as well as injection molding / extrusion method. 
 
Sintered ferrite (wet)
 
Raw material→ Wet grinding→ Wet pressing→ Sintering→ Machining→ Inspection→ Final product
 
Sintered ferrite (dry)
 
Raw material→ Making powder→ Dry pressing→ Sintering→ Machining→ Inspection→ Final product
 
Injection molding / Extrusion
 
Raw material→ Blending→ Injection/Extrusion→ Machining→ Magnetization→ Inspection→ Final product
 
Ceramic ferrite magnets machining
 
Ceramic (Ferrite) magnet material is very hard and brittle thus diamond tooling and some abrasives are the conventional means of fabrication for this magnet alloy. Most magnet materials are machined in the un-magnetized state. Once the fabrication and cleaning operation are complete the magnet is then magnetized to saturation. Anfeng Magnets is able to fabricate simple or complex shapes from Ceramic (Ferrite). 
Ceramic ferrite magnets magnetizing
Ceramic (Ferrite) magnets are fairly easy to magnetize and only require a reasonable magnetizing field. The anisotropic nature of wet pressed Ceramic (Ferrite) magnets results in a single direction of magnetization. This direction must be observed when magnetizing and when integrating the magnet into the final assembly. Often times a simple paint dot is used to identify a specific magnetic pole for the customer’s assembly process. 
 
Physical and mechanical properties
 
Density 4.5-5.1 g/cm³
Curie Temperature 450-460℃
Electrical resistivity >10 µΩ·cm
Required magnetizing field 12000-15000 Oe

 

Applications:
Motors, loudspeakers, magnetic couplings, sensors, magnetic holding / hanging device, magnetic hanging hooks, magnetic snaps, magnetic sealing trips , etc..




 

 

 

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