The magnetic material ferrite is represented by the regular expression shown in MFe2O4. M is mainly a divalent metal oxide, such as manganese oxide, nickel oxide, copper oxide, zinc oxide, etc. The practical ferrite is a polycrystalline sintered body composed of these compounds.

In addition, in terms of electrical properties, ferrite has a high resistivity compared to other metal magnetic materials. Therefore, it is not easy to generate eddy current and can be used in high-frequency fields. This type of ferrite is made by mixing, calcining, crushing, granulating, compressing, molding, sintering at a high temperature of 1000 ° C to 1400 ° C, and then processing the oxide raw materials such as iron, nickel, copper, and zinc with extremely high purity in accordance with the mass ratio that meets the material properties. In order to control the characteristics of ferrite within the established range, we implement strict process control for each of the above processes.

Ferrites can be selected from the best materials based on the relevant applications. As representative materials, there are two types of manganese zinc (Mn Zn) based ferrite and nickel zinc (Ni Zn) based ferrite. Manganese zinc (Mn Zn) based ferrites have the characteristics of high magnetic permeability and high magnetic flux density, and low loss below 1 MHz. In contrast, nickel zinc (Ni Zn) based ferrites have the characteristics of high resistivity, magnetic permeability generally below hundreds, and low loss above 1 MHz.

The following figure shows the main physical performance parameters of ferrite magnets (hardness/density/resistivity/specific heat/tensile strength...);

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