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Ferrite magnetic ring inductance is divided into manganese-zinc ferrite ring and nickel-zinc ferrite ring. Depending on the material used, the calcined material is also different. The nickel-zinc ferrite magnetic ring is mainly made of iron, nickel, and zinc oxides or salts, and is made by electronic ceramic technology. The manganese-zinc ferrite magnetic ring is made of iron, manganese, zinc oxides and salts, and is also made by electronic ceramic technology. They are basically the same in materials and processes, the only difference is that the two materials, manganese and nickel, are different. It is these two different materials that have very different effects on the same product. Manganese-zinc materials have high magnetic permeability, while nickel-zinc ferrites have low magnetic permeability. Manganese-zinc ferrite can be used in applications where the operating frequency is lower than 5MHz. Nickel-zinc ferrite has a high resistivity and can be used in the frequency range of 1MHz to hundreds of megahertz. Except for common mode inductors, for applications below 70MHz, the impedance of manganese-zinc materials makes it the best choice; for applications from 70MHz to hundreds of gigahertz, nickel-zinc materials are recommended. Manganese-zinc ferrite bead is generally used in the frequency range of kilohertz to megahertz. Can make inductors, transformers, filter cores, magnetic heads and antenna rods. Nickel-zinc ferrite magnetic rings can be used to make magnetic cores for mid-peripheral transformers, magnetic heads, short-wave antenna rods, tuned inductance reactors, and magnetic saturation amplifiers. The application range and product maturity are superior to Mn-Zn ferrite magnetic rings. Much. When two cores are mixed together, how do you distinguish between them? Two specific methods are described below. 1. Visual inspection method: Because Mn-Zn ferrite generally has a relatively high permeability, large crystal grains, and a relatively compact structure, it is often black. Nickel-zinc ferrite generally has low permeability, fine grains, porous structure, and often brown, especially when the sintering temperature is low during the production process. According to these characteristics, we can use visual methods to distinguish. In a bright place, if the color of the ferrite is black and there are more dazzling crystals, then the core is manganese-zinc ferrite; if you see the ferrite is brown, the luster is dim, and the particles are not dazzling, The magnetic core is nickel-zinc ferrite. The visual method is a relatively rough method, which can be mastered after a certain amount of practice. Magnetic ring inductance order 2. Test method: This method is more reliable, but it needs some test instruments, such as high resistance meter, high frequency Q meter, etc. 3. Pressure test.