Overview of soft ferrite magnetic materials
According to the strength of magnetism, the magnetism of substances can be divided into diamagnetism, paramagnetism, antiferromagnetism, ferromagnetism and ferrimagnetism, among which ferromagnetic and ferrimagnetic substances are strong magnetic substances. Magnetic materials usually refer to strong magnetic substances, mainly composed of transition group elements such as iron, cobalt, nickel and their alloys.
According to different application types, magnetic materials can be divided into soft magnetic materials, permanent magnetic materials and functional magnetic materials. Soft magnetic materials are magnetic materials with low coercivity to magnetic flux density and magnetization intensity. Compared with hard magnetic materials, they are easier to magnetize and demagnetize. They are usually used to prepare various electronic magnetic components such as inductors and electronic transformers. Realize functions such as power transmission, power conversion, and signal screening.
Overview of soft ferrite magnetic materials
According to different materials and structures, soft magnetic materials can be divided into metal soft magnetic, soft ferrite and amorphous and nanocrystalline soft magnetic alloys. Metal soft magnetism is typically represented by silicon steel sheet, which is the earliest soft magnetic material. Due to its low resistivity and high loss at high frequencies, it is more suitable for low-frequency scenarios. The metal soft magnetic powder core is made of alloy soft magnetic powder such as iron-nickel, iron-silicon, and iron-silicon-aluminum, which has improved the shortcomings of traditional silicon steel sheets with high frequency and high loss.
Soft ferrite magnetic materials have high resistivity and low saturation magnetic flux density, and are widely used in many fields because of their small loss in medium and high frequency scenarios and good machining characteristics. Amorphous alloy soft magnetism is prepared by alloy solution under rapid cooling process into amorphous alloy thin strip, nanocrystalline soft magnetism is obtained nano-scale soft magnetic alloy through appropriate annealing process on the basis of amorphous alloy soft magnetism, the above The material has better comprehensive performance in terms of saturation magnetic flux density and resistivity, but its technical maturity is lower than that of metal soft magnetism and soft ferrite. Overall, different types of soft magnetic materials are used in different demand scenarios due to differences in electromagnetic characteristics, technology maturity, and product prices.
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