Magna magnet products
Ferrite magnet
Ferrite magnets made from abundant ferric oxide are currently the cheapest and most stable sintered magnets (ceramic magnets).Since it has a high coercive force, it is difficult to demagnetize and is suitable for flat shapes.
Since the raw material of powder is molded by a press and sintered in a furnace at about 1,200 ° C, it has excellent corrosion resistance and is suitable for mass production.
It can be divided into two types: anisotropic ferrite magnets (Anisotropic Ferrite) and isotropic ferrite magnets (Isotropic Ferrite).
Features of ferrite magnets
- Materials can be supplied inexpensively and stably.
- Since the coercive force is high, it is difficult to demagnetize.
- Since it is a pottery, it is easily broken, but it is suitable for mass production because the raw material of powder is molded by a press machine.
- Since the specific gravity is 4.8 g / cm³, it can be lighter than other magnets.
- 2 to 10 or more poles on a flat surface.In addition, since multi-pole magnetization can be performed on the outer circumference, demand for meters and motors is increasing.
- It is used as a raw material for rubber magnets and plastic magnets.
Main raw material
Iron oxide (Fe₂O₃), strontium (Sr) or barium (Ba)
Ferrite magnet FAQ
What kind of things are ferrite magnets often used for?
Widely used in various electronic devices, stationery, etc. Demand for meters and motors is increasing because they can be magnetized with multiple poles on the outer periphery.
Will stains or chips affect the magnetic force?
According to our "appearance standards," we ship products that do not affect the performance of the magnet as "regular products."
If I want a magnet size that is not listed, how do I order it?
"Inquiry"Please feel free to contact us.
Ferrite magnet product information
Anisotropic ferrite magnet
By pressing the raw material in a magnetic field, the smallest units of the magnet are aligned in one direction, creating an anisotropic magnet.
[Wet type] The main raw material is mixed with water to make a slurry (muddy water-like liquid), which is then poured into a mold and pressed into a mold. After sintering in a furnace, the product is polished and washed to improve the dimensional accuracy of the height.
[Dry type] The powder of the raw material is granulated, press molded, and sintered in a furnace. The magnetic force is about 7% lower than that of the wet type, but unlike the wet type, it has the advantage that chamfering can be done by press molding.
Isotropic ferrite magnet
The main raw material is powdered and then granulated. It is pressed without applying a magnetic field, and then sintered in a furnace. Since the magnetic force is generated in the direction of the applied magnetic field, the magnetic force is generated in both the axial and radial directions. However, the magnetic force is about half as strong as that of anisotropic ferrite.
Cap magnet
A magnet application product that combines a ferrite magnet and a yoke (iron) to concentrate the magnetic force in a certain direction and make it stronger.
Ferrite mirror finish
A ferrite magnet that is black and has a deep brilliant surface finish due to special processing.
