ferrite magnet generator

General Description:

1.High intrinsic coercive force 

2.Tooling is expensive 

3.Least expensive material compared to alnico and rare earth magnets 

4.Limited to simple shapes due to manufacturing process

5.Lower service temperature than Alnico ,greater than rare earth 

6.Finishing requires diamond cutting or grinding wheed 

7.Lower energy product than alnico and rare earth magnets 

8.Most common grades of ferrite are 1,5 and 8(1-8 possible )

9.Grade 8 is the strongest ferrite material available 

How ferrite magnets are made?

The first is to press the dry fine powder in a die which results in an isotropic magnet (e.g.ferrite C1 grade )which has better dimensional tolerances (it will often not require any further machining to final size ).The hexagonal crystal structure is random allowing the magnet to be magnetised in any direction afterwards .

The second method involves mixing the fine powder with water to produce a slurry which is then compacted in a die in the presence of an externally applied magnetic field .The external magnetic field helps the hexagonal crystal structure align more perfectly with the magnetic field,improving the magnetic performance (e,g,ferrite C8)- the water in the slurry acts like a lubricant .This results in an anisotropic ferrite magnets with stronger magnetic properties but it will possibly require additional machining stages to give the final dimensions.

Ferrite Magnets Characteristics

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