Ferrite magnets became commercially available in the mid 1950's. Ferrite magnets are also commonly known as ceramic magnets, because of the process of used to produce them. The raw materials used in the ferrite magnet production are iron oxide, and barium/strontium carbonate. All of these are non-strategic, plentiful available and low in cost. Ferrite, or iron oxide, is mixed with strontium and then milled to a very fine powder. The powder is then mixed with a ceramic binder and pressed into shape. These pressed parts are fired in a tunnel kiln to complete the ceramic process, sintering. The result is a hard and brittle part requiring diamond wheels for grinding to close tolerance. Ceramic magnets will not withstand the mechanical stresses required of structural members. Due to the nature of this material, small cracks, chips, porosity, etc. are common and should be expected but will not interfere with the performance of the magnets. Energy products for ferrite materials range from 1 to 4.5 MGOe and is best suited for environments under 300° C (570° F).
All of our ceramic magnets are manufactured to rigid magnetic and physical properties that meet or exceed the Standards set by MMPA (U.S.A.), the Magnetic Materials Producers Association of the United States. Our plant is ISO-9001 and TS16949 certified. Every manufacturing processing includes thorough quality control.
The raw materials used in the ceramic magnet production are iron oxide, and barium/strontium carbonate. All of these are non-strategic, plentiful available and low in cost. Ceramic magnets are formed by compaction and sintering. The result is a hard and brittle part requiring diamond wheels for grinding to close tolerance. Ceramic magnets will not withstand the mechanical stresses required of structural members.
Magnet Ceramic-1 is non-oriented and isotropic with equal magnetic properties in any direction of magnetization. High-grade ceramic magnets are oriented. They must be magnetized in the direction of orientation, which is the same as the direction of pressing. All magnets are available in variety of shapes and sizes, including round disks, rings, blocks, arc segments, U-shapes, rotors, cylinders, etc. The finished products could be magnetized or unmagnetized as user specified.
Magnetic Properties:
Grade |
Br, Gauss |
Hc, Oersteds |
iHc, Oersteds |
(BH)max, MGOe |
Equivalent |
FMI-1 |
2000 ~ 2300 |
1600 ~ 2000 |
3200 ~ 4000 |
0.8 ~ 1.1 |
C-1, FB1A, YBM-3 |
FMI-5 |
3800 ~ 4200 |
2200 ~ 2600 |
2250 ~ 2650 |
3.4 ~ 4.0 |
C-5, FB4A, YBM-1BB |
FMI-5D |
3800 ~ 4200 |
3100 ~ 3500 |
3300 ~ 3700 |
3.4 ~ 4.0 |
YBM-2BD |
FMI-7 |
3400 ~ 3800 |
3200 ~ 3600 |
4000 ~ 4400 |
2.7 ~ 3.4 |
C-7, YBM-2BC, FB4H |
FMI-7A |
3400 ~ 3800 |
3050 ~ 3450 |
4000 ~ 4400 |
2.5 ~ 3.1 |
|
FMI-7B |
3600 ~ 4000 |
3250 ~ 3750 |
3800 ~ 4200 |
3.0 ~ 3.6 |
YBM-2BE |
FMI-7C |
3600 ~ 4000 |
3400 ~ 3800 |
4600 ~ 5000 |
3.1 ~ 3.5 |
YBM-2BF |
FMI-8 |
3800 ~ 4200 |
2800 ~ 3400 |
2850 ~ 3450 |
3.5 ~ 4.1 |
C-8, FB4D, YBM-2B |
FMI-8B |
4100 ~ 4300 |
2800 ~ 3200 |
2850 ~ 3250 |
4.0 ~ 4.4 |
YBM-2BB |
FMI-8C |
4100 ~ 4300 |
2200 ~ 2500 |
2350 ~ 2550 |
4.0 ~ 4.3 |
FB4N, YBM-2BA |
FMI-8D |
4200 ~ 4400 |
3150 ~ 3500 |
3200 ~ 3600 |
4.2 ~ 4.4 |
FB5B, YBM-6BB |
Besides application in motors, ring shape ceramic magnets and block type are also widely used for loudspeakers and magnetic separator devices.
Main Advantage of ceramic magnet:
* best cost-efficiency
* high temperature resistance
* easy for production
Manufacturing process:
Raw materials-Ball Milling- Pulverizing-Pressing-Sintering-Grinding-Cleaning-Inspecting and Packing |
