The Use Of Different Magnetic Materials

The use of different magnetic materials

1. Soft Ferrite EMI/EMC NiZn Core. The main component of soft ferrite is Fe2O3, which is suitable for high-frequency and low-power working scenarios in the MHz(1MHZ-1000MHZ) range. It is mainly used in the conversion, induction filter, coupling, transmission, transformation and absorption of electromagnetic signals in electronic systems. The most widely used is to make various filters (EMI), electronic transformers, inductors, etc. Soft ferrite core is characterized by low saturation magnetic flux density, low coercivity, but high permeability. In addition, its resistivity is very high, the eddy current loss is small, so it is widely used as a magnetic material in high frequency . Due to the sintering process, soft ferrite core can be easily made into various shapes , but it is brittle and easily broken. Soft ferrite core also has the advantages of excellent corrosion resistance and oxidation resistance, and low price. 

2 Amorphous alloy core: Amorphous core are a new type of functional materials emerging in the 21st century. The resistivity of amorphous alloys core is about three times higher than that of crystalline alloys, which greatly reduces eddy current loss; at the same time, amorphous alloys core have no magnetocrystalline anisotropy, resulting in high permeability and low coercivity. In addition, amorphous alloys core have higher Its strength and excellent corrosion resistance have attracted wide attention. At present, amorphous alloy materials are mainly used in the field of distribution transformers. Compared with silicon steel materials, amorphous alloy core materials have outstanding energy saving and environmental protection properties. Amorphous core is made by rapid cooling process, forming from molten steel to amorphous alloy thin strip products at one time, silicon steel is made by traditional steel metallurgy preparation process, and the production process of amorphous alloy is significantly shorter than that of silicon steel products; in application Amorphous alloy materials have material properties such as high magnetic permeability, low coercivity, and high resistivity. The electromagnetic energy conversion efficiency is significantly better than that of silicon steel materials. The no-load loss of amorphous transformers can be reduced by about 70% compared with silicon steel transformers. Energy saving; in terms of recycling, the waste amorphous iron core can be remelted into an amorphous alloy thin strip through an intermediate frequency furnace, and the silicon and boron elements in the amorphous iron core can basically be recycled and reused to achieve recycling and energy saving.

3 Nanocrystalline core . Nanocrystalline core refers to iron-based nanocrystalline alloys, which are formed from iron, silicon, boron and a small amount of copper, niobium and other elements through a rapid cooling process to form an amorphous alloy, and then go through a highly controlled annealing process to form nano-sized crystallites. Materials with mixed bulk and amorphous structures. Nanocrystalline materials benefit from the advantages of high saturation magnetic density, high magnetic permeability, and high Curie temperature. Compared with soft ferrite core materials, they have significant advantages in the pursuit of miniaturization, light weight, and complex temperature scenarios. Nanocrystalline core mainly used in the production of inductive components, electronic transformers, transformers, sensors and other products, can be used in new energy vehicles, consumer electronics, new energy power generation, home appliances and particle accelerators and other fields, especially in recent years, nanocrystalline core in emerging industries With the gradual promotion of applications such as wireless charging modules and new energy vehicle motors, nanocrystalline alloy core are expected to usher in a broad market growth space.