product name: Ferrites
Ferrites are a class of chemical compounds with the formula AB2O4, where A and B represent various metal cations, usually including iron. They are generally composed of iron and barium or strontium oxides. Ferrite magnets are very hard, but brittle ceramic products. They are characterized by a vey high normal and intrinsic coercive force, but a rather low residual induction and are virtually free from the effects of a self-demagnetization. They posses a very high electrical resistivity that makes them ideally suited for high frequency applications as the eddy current losses are almost negligible.
Ferrites are a class of chemical compounds with the formula AB2O4, where A and B represent various metal cations, usually including iron. They are generally composed of iron and barium or strontium oxides. Ferrite magnets are very hard, but brittle ceramic products. They are characterized by a vey high normal and intrinsic coercive force, but a rather low residual induction and are virtually free from the effects of a self-demagnetization. They posses a very high electrical resistivity that makes them ideally suited for high frequency applications as the eddy current losses are almost negligible.
Corrosion resistance property of ferrite is very good and as such ni surface treatments are required.
Machining
Ferrite magnets are prone to chipping ad cracking due to their brittleness. Special machining techniques such as grinding with diamond tools are required for matching the dimension specifications.
Applications
Typically Ferrites have a high coercivity and are very economical in costs.
Thus they are very popular.
Blocks/plates
Typical Applications include
Thus they are very popular.
Magnetic properties (not less)
| Grade | Br, T | Hcb, kA/m | Hcm, kA/m | (BH)max, kJ/m3 |
| 6BI240 | 0.19 | 125 | 240 | 6.0 |
| 8BI220 | 0.21 | 125 | 215 | 7.0 |
| 22BA220 | 0.36 | 215 | 220 | 22.0 |
| 24BA210 | 0.37 | 205 | 210 | 24.0 |
| 25BA170 | 0.38 | 165 | 170 | 25.0 |
| 18SA220 | 0.33 | 210 | 220 | 18.0 |
| 27SA240 | 0.37 | 230 | 240 | 27.0 |
| 28SA250 | 0.39 | 240 | 250 | 28.0 |
Shapes and sizes available (as standard):
Shapes: Blocks, plates, rods/cylinders, disks, rings, arc of segments.
Two poles
Shapes: Blocks, plates, rods/cylinders, disks, rings, arc of segments.
Two poles
Standard sizes:
Blocks/plates
| Min, mm | Max, mm | |
| W | 5 | 100 |
| T | 5 | 16 |
| L | 5 | 120 |
Rods/Cylinders
| Min, mm | Max, mm | |
| Dia | 3 | 15 |
| L | 3 | 30 |
Disks
| Min, mm | Max, mm | |
| Dia | 3 | 100 |
| h | 3 | 5 |
Rings (isotropic)
| Min, mm | Max, mm | |
| OD | 5 | 45 |
| ID | 3 | 30 |
| h | 2 | 25 |
Rings (anisotropic)
| Min, mm | Max, mm | |
| OD | 36 | 135 |
| ID | 18 | 60 |
| h | 6 | 20 |
Arcs/segments (anisotropic)
| Min, mm | Max, mm | |
| W | 10 | 80 |
| L | 10 | 140 |
| H | 3 | 45 |
Segment ferrite magnets for motors.
Typical Applications include
· Inductors
· Transformers
· Loudspeakers
· Electromagnetic Instrument pick up
DC motors
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