It is a metal oxide with ferromagnetism. In terms of electrical properties, ferrite magnets have much higher electrical resistivity than metal and alloy magnetic materials, and also have higher dielectric functions. The magnetic function of ferrite magnets also exhibits high permeability at high frequencies. Therefore, ferrite magnets have become common non-metallic magnetic materials in high-frequency and weak current applications. Due to the low magnetic energy and low saturation magnetization (usually only 1/3-1/5 of pure iron) stored in the unit volume of ferrite magnets, their use in low-frequency, high-power, and high-power band boundaries that require higher magnetic energy density is limited. The classification of ferrite magnets is that ferrite magnets are sintered from iron oxide and other components. Generally, it can be divided into permanent ferrite magnets, soft ferrite magnets, and rotating ferrite magnets. Permanent ferrite magnets, also known as ferrite magnets, are the small black magnets we see every day. Iron oxide, barium carbonate, or strontium carbonate are the main raw materials. After magnetization, the strength of the remaining magnetic field is very high and can be maintained for a long time. Usually used as a permanent magnet material. For example: speaker magnet. Soft ferrite magnets are prepared by sintering iron oxide and one or more other metal oxides. The reason why it is called soft magnetism is because when the magnetized magnetic field dissipates, the remaining magnetic field is very small or almost non-existent. Usually used as a choke coil or magnetic core for intermediate frequency transformers. Spin magnetic ferrite magnets refer to raw materials of ferrite magnets with spin magnetism. The rotational magnetism of magnetic raw materials refers to the phenomenon that, under the action of two vertical DC magnetic fields and electromagnetic wave magnetic fields, planar polarized electromagnetic waves will continuously rotate around the propagation target during the propagation of electromagnetic waves within the raw material according to the determined target. Spin magnetic ferrite magnets are widely used in microwave communication. The difficulty of ferrite magnet die-cutting is that this raw material mainly appears in the form of thin sheets, with thin thickness, high quality, and fragility. It can crack when gently lifted with a finger. Under conventional stress conditions, splitting does not occur with the stressed target.