The development of soft magnetic materials and types

1. Application of soft magnetic materials, the development of soft magnetic materials in industry began in the late 19th century. With the rise of power and telecommunication technology, started to use mild steel manufacturing motor and transformer, inductance coil in the line of the magnetic core were used in the small iron powder, ferric oxide, fine wire, etc. To the beginning of the 20th century, developed silicon steel sheet instead of low carbon steel, improve the efficiency of transformer, reduce the loss. Until now, silicon steel sheet in the power industry with soft magnetic material is still in the lead. To 20 s, the rise of radio technology to promote the development of the high permeability material, the permalloy and permalloy magnetic powder core. From 40 s to 60 s, as the period of the rapid development of science and technology, radar, television and radio, the invention of the integrated circuit and so on, the higher requirement for soft magnetic materials, production out of the soft magnetic alloy thin belt and soft magnetic ferrite materials. Into the 70 s, with the development of telecommunications, automatic control, computer and other industries, developed head with soft magnetic alloy, in addition to the traditional and amorphous soft magnetic alloy, a rise of another kind of material - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Amorphous soft magnetic alloy. 2. Common types of soft magnetic core iron, cobalt, nickel is three kinds of ferromagnetic elements of magnetic materials. According to the ( Main ingredients, magnetic characteristics, structural characteristics) Products shape classification: ( 1) Powder core classes: magnetic powder core, including: iron powder core, iron, silicon aluminum core, high flux powder core ( 高通量) , slope mo alloy powder core ( MPP) , ferrite core. ( 2) Belt around the iron core, silicon steel, permalloy, amorphous and nanocrystalline alloy.
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