Hard Anisotropic Ferrite Magnet
Ceramic magnets (also known as "ferrite" magnets) are part of the permanent magnet family and are currently the lowest cost hard magnets.
The ceramic (ferrite) magnet composed of strontium carbonate and iron oxide has medium strength and can be used at quite high temperature.
Physical Properties of Anisotropic Ferrites
| Density | 4.8 ~ 5.1 g/cm³ |
| Electrical Resistivity | >=10(4) Ω.cm |
| Recoil Permeablility | 1.05 ~ 1.03 |
| Curie Temperature | 460 ~ 480℃ |
| Temperature Coefficient of Br | -0.18 ~ -0.2 % / ℃ ( 0-100℃) |
| Temperature Coefficient of Hc | 0.2 ~ 0.5 % / ℃( 0-100℃) |
| Coefficient Of Linear Expansion | 7 ~ 15 X 10(-6) /℃ |
Applications
Fan Motors
Wiper Motors
EPS Motors
Starter Motors
Home appliance Motors
Industrial Motors
Motorcycle Motors
other DC Motors
Process of Ferrite Magnet manufacturing
Raw Material--Mixing / Milling--Calcination--Coarse Milling--Wet Milling--Pressing--Sintering--Grinding&Finishing--Final Inspection--Packing and Dispatch
Advantages of Ferrite Magnets
Do not corrode in water.
Can be used up to ﹢250 degrees C.
Sometimes up to +300 degrees C in special circumstances.
High coercivity (Hci) that increases as magnet heats up.
Electrically insulating.
Low cost.
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