Ferrite is a ferromagnetic metal oxide. In terms of electrical properties, ferrite has higher dielectric properties, and its resistivity is much larger than that of metal and alloy magnetic materials. The magnetic properties of ferrites also show that they have high permeability at high frequencies. Therefore, ferrite has become a non-metallic magnetic material widely used in the field of high frequency weak current.
The ferrite magnetic ring mentioned here is a commonly used anti-interference component in electronic circuits, which has a good suppression effect on high-frequency noise, and is generally made of ferrite material. Ferrite magnetic rings can be divided into soft magnetic, hard magnetic, gyromagnetic, moment magnetic according to their coercive force (the strength of the external magnetic field opposite to the original magnetization direction that must be added to make the magnetized ferromagnetic substance lose its magnetism) and use. , Piezomagnetic five categories.
The main advantage of soft ferrite magnetic rings is that the resistivity is much greater than that of metal magnetic materials, which inhibits the generation of eddy currents, so that ferrite can be used in high-frequency fields; it is easy to make various shapes and sizes by using ceramic technology; chemical properties Stable, no rust; lower manufacturing cost. The main disadvantages of soft ferrite are low saturation magnetic flux density, brittle texture and brittleness.
Ferrite magnetic ring products made of ferrite are generally used in the manufacture of various inductors, transformers, filters and choke coils, and are widely used in modern electronic information fields, such as computers and their peripheral equipment, office automation equipment , digital communication and analog communication equipment, Internet, household appliances, electromagnetic compatibility equipment, green lighting, industrial automation and automotive, aviation, aerospace and military fields.