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Permanent Ferrite Magnets  

Hard ferrite (Ceramic) magnets take more than 75% of the world magnet production and have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price.

The chemical composition of magnets is iron oxide, barium and strontium elements. SrO-6(Fe₂O₃)or BaO-6(Fe₂O₃).    

The type size: Ring & Cylinder  DIA 5-220mm, Block 4-200mm, Segment (tile), ball of magnetic jewellery, Bar & Horseshoe Magnet.

It is the first choice for most types of speaker, DC motors, magnetic separators, MRI (magnetic resonance imaging) and automotive sensors. 

THE CHARACTERISTICS, US MMPA0100-90 STANDARDS.

THE CHARACTERISTICS, : IEC,TDK,SJ/T10410-93 STANDARDS.

The Direction of Magnetization:

1) Axially magnetized orientation,     2) Radially magnetized through diameter,

3) Multiple pole magnetized  axially, 4) Multiple pole magnetized  radially.

 

Permanent Ferrite Magnet widely use for Speaker, Earphone, Telephone receiver.

1.General ring size:(OD x ID x T), Unit: mm

2.Smaller ring size:(OD x ID x T) ,Unit: mm

3.Small cylinder size:(OD x T),Unit: mm

 

Permanent NdFeB magnet for Speaker, Earphone, Telephone receiver, Microphone.

General Ring size (unit: mm)