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A summary of the special properties and characteristics of the five core magnetic materials

1. Ferrite magnetic materials generally refer to the oxides of iron oxide and other metal oxides. Most of them have ferromagnetic properties. Features: Resistivity is far higher than metal, about 1-10 (12th power) ohm/cm, so the eddy loss and skin effect is small, suitable for high frequency use. Low saturation magnetization, not suitable for high magnetic density applications. Curie temperature is relatively low.
2, ferromagnetic material: refers to the material with ferromagnetic. For example, iron-nickel-cobalt and its alloys, some rare earth alloys. Below the Curie temperature, the material has a greater magnetization when external magnets are added.
3, ferrimagnetic material: refers to the material with ferrimagnetic, such as various ferrite, below the Neill temperature, the material has a greater magnetization when the external magnetic.
4. Permanent magnet material: The magnet is thickened by magnetization and the external magnetic field still has strong magnetic properties, which is characterized by high coercive force and large magnetic energy product. Can be divided into three categories, metal permanent magnets, examples, aluminum nickel and cobalt, rare earth cobalt, neodymium iron boron and so on. Ferrite permanent magnets, for example, barium ferrites, barium ferrites, other permanent magnets, such as plastics.
5, soft magnetic material: also known as soft magnetic alloy, is easily magnetized and demagnetized material. Manganese-zinc-ferrite soft magnetic material, its operating frequency between 1K-10M. Nickel-zinc-ferrite soft magnetic material, working frequency is generally 1-300MHZ 6 Metal soft magnetic material: Compared with ferrite, it has high saturation magnetic induction intensity and low coercive force, such as pure iron, iron-aluminum alloy, iron Cobalt alloys, iron-nickel alloys, etc., are commonly used in transformers and the like.

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