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Ferrite magnets are sintered permanent magnets composed of Barium or Strontium Ferrite. This class of magnets, aside from good resistance to demagnetization, has the popular advantage of low cost.
Advantages:
1 Because they are ceramic, Ferrite magnets have a tendency to break or chip and require careful handling during assembly.
2 The magnetic flux temperature coefficient is -0.18%/„aC, much larger than for rare earth magnets or alnico magnets, so temperature stability must be taken into account.
3 Coercive force decreases at a rate of 0.5%/„aC when the temperature decreases, and problems many occur due to low temperature demagnetization. It is vital that the magnet¡¦s operating point be higher than the knee point on its demagnetization curve.
4 Low cost No surface treatments.
Application Fields:
Motors, loudspeakers, medical equipments, instruments, sensors, toys, crafts, and so on.
Detailed information:
The properties: We could produce the Ferrite magnets with many grades from the isotropic Y10T to antistrophic Y35, for the detailed information, please kindly check the properties chart. We could adjust our composition to meet our customer¡¦s requirement.
The magnetization: Ferrite magnets can be produced isotropically or anisotropically. Isotropic grades are not oriented and can be magnetized in any direction, although some degree of greater magnetic strength will be found in the pressing dimension. Anisotropic grades are oriented in the manufacturing direction, and must be magnetized in the direction of orientation.
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Hard ferrite (ceramic) magnets were developed in the 1960's as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, ferrite magnets have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.
To better serve our customers of hard ferrite magnets, Arnold sources material from qualified manufacturers throughout the world.
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Tolerances of hard ferrite magnets
Bakker Magnetics can guarantee tolerances applicable to unfinished magnets
(DIN 17410). Customers can obtain the desired tolerances on request. If the
customer so wishes, we can deviate from our standard tolerances.
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Material Information
* Produce by powder metallurgical method
* Chemical composition of Ba/Sr O FeO
* Relatively brittle & hard
* Good resistance to demagnetization
* Excellent corrosion resistance
* Raw material is readily available & low in cost
* Good temperature stability
* Most widely used permanent magnets.
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Magnets
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Dexter is an authorized distributor of ferrite cores for EMI applications. Our product line includes top manufacturers, such as:
>Fair-Rite Products
>TDK
>EPCOS
>Magnetics, Inc.
>Ferronics
>Acme Electronics
We have the industry’s largest in-stock inventory of:
>Round Cable EMI Suppression Cores
>Split Round Cable EMI Suppression Cores
>Round Cable Snap-its
>Flat Cable EMI Suppression Cores
>Flat Cable Snap-its
>Toroids
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Dexter is an authorized distributor of ferrite cores for EMI applications. Our product line includes top manufacturers, such as:
>Fair-Rite Products
>TDK
>EPCOS
>Magnetics, Inc.
>Ferronics
>Acme Electronics
We have the industry’s largest in-stock inventory of:
>Round Cable EMI Suppression Cores
>Split Round Cable EMI Suppression Cores
>Round Cable Snap-its
>Flat Cable EMI Suppression Cores
>Flat Cable Snap-its
>Toroids
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