Nickel zinc (Ni-Zn) is a soft magnetic ferrite material

　　Ferrite is a kind of ceramic material, it is composed of a variety of oxides, including iron oxide, nickel oxide, zinc oxide, copper oxide and so on. Like ceramics, ferrites are very hard, low active, and contain no organic ingredients. Ferrite has many properties that make it widely used in electronic devices. It has a high permeability, can concentrate on strengthening the magnetic field; Has a high resistivity, can limit the current through. In addition, ferrites can be used in different frequency bands and maintain low energy loss according to their permeability. Ferrites can be made in different shapes and sizes to suit specific uses. When used to suppress electromagnetic interference, ferrites work by dissipating energy that does not require frequency in the form of heat absorbed by impedance.

　　The permeability of nickel-zinc ferrite is relatively low, from ten to several thousand (2000 or so), and the high frequency characteristics are good. The following is part of the specifications of TDG nickel-zinc ferrite, from which the permeability range can be seen.

　　Nickel-zinc soft magnetic ferrite material is another kind of high frequency soft magnetic material with large yield and wide application. When the application frequency is below 1MHz, its performance is inferior to that of manganese zinc (Mn-Zn) ferrite, but above 1MHz, because of its porosity and high resistivity, its performance is much better than manganese zinc (Mn-Zn) ferrite, which is very suitable for high frequency use.

　　Ferrite wide-band devices made of nickel-zinc soft magnetic ferrite materials can be used in a wide range of frequencies, the lower limit frequency can be several thousand Hertz, the upper limit frequency can be several thousand megahertz, greatly expanding the frequency range of soft magnetic materials, the main function is to achieve RF signal energy transmission and impedance conversion in the wide band range. Because of their wide frequency band, small size, light weight and other characteristics, they are widely used in radar, television, communication, instrumentation, automatic control, electronic countermeasures and other fields.

　　Currently, the industrial production of nickel zinc ferrite, TDK, FDK of Japan, Siemens of Germany, Stealword of the United States are recognized as the technical level of the products. On... High, RF wideband Ni-Zn(magnetic cores) operate at frequencies ranging from 0.1MHz to 1.5GHz.

　　Nickel-zinc (Ni-Zn) magnetic beads, applied in EMI and noise processing, before and after treatment (and of course other special ferrite material magnetic beads)

　　Nickel-zinc ferrite core bead magnetic component

　　Nickel-zinc ferrite latched magnetic ring anti-interference filter can be fitted on power cord and signal line

　　Nickel zinc ferrite core material can be used as power inductor and transformer, please refer to Tianteng (TDG) material description

　　Nickel zinc soft magnetic ferrite material model comparison between domestic and foreign manufacturers (corresponding equivalent model)

　　In short, for our common ferrite, manganese zinc ferrite materials are mainly divided into: ① high frequency low power ferrite (also known as power ferrite, initial permeability is usually less than 5000, most in 2000) and ② high permeability that is high μi(initial permeability) ferrite two categories; Nickel zinc ferrite material, mainly used in high frequency applications.

　　But no matter what kind of material, in general, the making of transformer core material, requires a higher (initial) permeability, so that you can easily get a larger inductance, thereby reducing the excitation current, reduce the transformer storage energy; We all know the storage energy requirements per unit volume of the magnetic core materials for the production of power inductance. The greater the permeability, the lower the storage energy of the magnetic core material itself. Therefore, the inductive magnetic core materials are mostly low permeability materials, typical of which is now widely used as "magnetic powder core materials".

　　Common magnetic core:

　　① iron powder core, ② ferrosilicon aluminum ③ ferrosilicon ④ high magnetic flux powder core ⑤, molybdenum Permo alloy powder core

　　Low permeability is not what makes inductance... Conditions, we also need to consider the DC stacking or DC Bias characteristics of this material. For example, the "amorphous alloy" with high permeability is also an excellent material for making inductance, but we open some air gaps to "dilute" the permeability and get the appropriate effective permeability "ue".

　　The following is the DC bias (applied DC) characteristic of Tiantong Iron Si Al

　　The following is a comparison between the effective permeability of a mangano-zinc ferrite obtained by adding an air gap, and the DC bias characteristics and the magnetic powder core. It can be seen that the magnetic powder core shows slow saturation characteristics in the area of high magnetic field, so the permeability is relatively stable. The inductance of wound is more stable under large DC bias, which is not easy to be saturated.

　　The above is nickel zinc ferrite soft magnetic material characteristics and its application in the circuit of the relevant knowledge, I hope to help you.