Ferrite is an important permanent magnetic material, which is widely used in electronics, electricity, machinery and other fields. According to the magnetic properties, chemical composition, processing technology and other factors, ferrite can be divided into three types, namely barium carbonate ferrite, aluminum oxide barium ferrite and barium ferrite-cobalt ferrite. Below we will introduce the characteristics and applications of these three ferrites respectively.
1. Barium carbonate ferrite
Barium carbonate ferrite is a typical hard magnetic material with high magnetic energy product and good heat resistance. Among them, the magnetic energy product refers to the maximum value of magnetic energy per unit volume when the magnet works in a magnetic field. Therefore, barium carbonate ferrite can maintain its magnetic properties unchanged in high temperature environment, and also performs well in motors, instruments and other equipment. Barium carbonate ferrite is relatively simple to prepare and has low cost, so it is widely used in a large number of permanent magnet motors, such as wind turbines, electric locomotives and electric vehicles.
2. Aluminum oxide barium ferrite
The characteristics of aluminum oxide barium ferrite are its high magnetic permeability, low ferromagnetic crystal domain wall reluctance and high saturation magnetic induction intensity. Therefore, aluminum oxide barium ferrite is widely used in high-frequency fields, such as magnetic storage, microwave devices, antennas, etc. At the same time, aluminum oxide barium ferrite can also be used in strong magnetic field applications such as magnetic measuring instruments and permeameters.
3. Barium ferrite-cobalt ferrite
Barium ferrite-cobalt ferrite is a popular soft magnetic material with high resistivity and hardness. In the field of superficial frequency applications, barium ferrite-cobalt ferrite is widely used in high-frequency transformers, inductors, power filters and other fields. In addition, barium ferrite-cobalt ferrite can also be used in data processors and computers, becoming an important soft magnetic material.
