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Ferrite material knowledge is introduction

Ferrite, commonly known as oxide magnetic materials is to belong to a kind of magnetic core material, it is a kind of compound oxides, permanent magnetic ferrite by Fe (iron) and other metal elements. Ferrite process is ceramic, high-temperature calcination and made into various shapes of parts.
In fact, in all appear the phenomenon of metal magnetic core material, can be strong magnetic to observed in the ferrite, but the metal core material and ferrite material, there are two basic differences:
First, is the saturation magnetization of magnetic materials is higher than metal ferrite, ferrite is usually half of the metal material to one 5;
Second, the resistivity of ferrite is more than one million times that of metal magnetic.
Based on these two differences, for low frequency high power (below 1000 hz) is commonly used core metal magnetic core material, high frequency (above 1000 hz) core with ferrite core materials.
Ferrite classification:
According to the purpose and characteristics of the ferrite, divides into the ferrite gyromagnetic, permanent magnet, magnetic torque and magnetic and magnetic pressure and other five categories;
According to the lattice type of soft magnetic ferrite core points, the most important are spinel, garnet and magnetic stone type three categories. Most of the soft magnetic ferrite spinel structure, the general expression for the chemical MeFe2O4, here Me say divalent metal elements, such as: Mn, Ni, Mg, Cu, zinc, etc.
Soft magnetic ferrite materials is the most various kinds of ferrite materials production, use one of the most widely. Soft magnetic ferrite core according to chemical composition, magnetic materials, applied to classify. The main characteristics of soft magnetic ferrite materials is starting high permeability and low coercive force, which are easy to be magnetized is extremely easy to demagnetization, shape of the hysteresis loop is thin and long.
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