Ferrite Ring Magnet

Ferrite Ring Magnet

Ferrite is a new type of non-metallic magnetic material developed in the 1940s. It is sometimes called magnetic porcelain because of its preparation process and appearance similar to ceramics. Ferrite generally refers to the composite oxide of iron group and one or more other appropriate metal elements, which belongs to semiconductor and is used as a magnetic medium.

The composite oxide composed of iron oxide and one or several other metal oxides (such as BaO·6Fe2O3, MnO·Fe2O3·ZnO·Fe2O3, etc.) is called ferrite. Ferrite with ferrimagnetism is a kind of strong magnetic material, commonly known as ferrite magnetic material. FeO·Fe2O3 (Fe3O4) is the simplest and earliest applied natural ferrite magnetic material in the world.

Ferrite magnetic materials can be divided into soft magnetic, hard magnetic (including bonded), gyromagnetic, moment magnetic and piezoelectric and other ferrite materials.

Features: soft magnetic materials have high permeability, low coercive force, and low loss; hard magnetic materials have high coercive force Hc and high magnetic energy product (BH) m; gyromagnetic materials have gyromagnetic properties, that is, electromagnetic waves along When the direction of a constant magnetic field propagates, the vibration surface continuously rotates along the direction of propagation. Gyromagnetic materials are mainly used in microwave communication devices. The moment magnetic material has a rectangular B-H hysteresis loop, which is mainly used in computer storage cores; the piezomagnetic material has a large linear magnetostriction coefficient λs. Ferrite magnetic materials have been widely used in computer, microwave communication, television, automatic control, aerospace, instrumentation, medical treatment, automobile industry and other fields, among which hard magnetic and soft magnetic ferrite materials are the most used.

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