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Magnet, strong powerful magnets: simple introduction

by:Newland     2020-04-11
1 used a magnet performance: including magnet material remanent magnetization ( Br) , the intensity of magnetic pole coercive force ( Intrinsic coercive force) ( Hcj) Magnetic induction intensity of coercive force ( Hcb) , the maximum magnetic energy product ( ( BH) max) 2 assist magnet magnetic: including magnet material reply the relative magnetic permeability, μrec) , remanent magnetization (temperature coefficient α( Br) ) And magnetic pole strength coercive force (temperature coefficient α( Hcj) ) , Curie temperature ( Tc) 2, the classification and grade of magnet materials: 3 magnet material classification: sintered ndfeb strong magnet: ( A strong magnet) Powerful magnets: material according to the intensity of magnetic pole size of coercive force is divided into low coercive force N, moderate coercive force M, H high coercive force, high coercive force SH, high coercive force, UH, high coercive force magnet EH six products brand: each type of product according to the maximum magnetic energy product size divided several brand N35 - N52 N35M - N30H——N50M, N48H,N30SH— N45SH N28UH - N28EH——N35UH, N35EH4 magnet digital brand: brand sample: 048021 ( BH) Max is 366 ~ 398 kj/m3, Hcj to 800 ka/m sintered ndfeb strong magnet: powerful magnets: materials. 5 magnet character brands: sintered ndfeb strong magnet: powerful magnets: material grades by the main ChenHe two magnetic properties of three parts, the first part is given priority to, according to the chemical symbol ND of neodymium, iron chemical symbol of FE and boron element, chemical symbol B, the second part is the line in front of the Numbers, the biggest magnetic energy product material ( BH) The nominal value (Max The unit is kj/m3) , after the third part is the slash, digital, magnetic pole strength coercive force value ( The unit is KA/m) One over ten of the value USES the nearest integer. Brand example: NdFeb380/80 ( BH) Max is 366 ~ 398 kj/m3, Hcj to 800 ka/MR sintered ndfeb strong magnet: powerful magnets: materials. 6: sintered ndfeb strong magnet powerful magnets: materials of the chemical composition of ndfeb strong magnet: powerful magnets: material is based on intermetallic compounds RE2FE14B powerful magnets: materials. Main ingredients for rare earth ( 重新) , iron ( FE) , boron ( B) 。 The rare earth ND for different performance available parts of dysprosium ( Dy) , praseodymium ( Pr) Other rare earth metals replace, iron can also be cobalt ( Co) , aluminum ( Al) And other metal parts to replace, the content of boron is small, but to form a square crystal structure between the metal compounds play an important role, yes compounds with high saturation magnetization, high uniaxial anisotropy and high Curie temperature. 6 strength of sintered ndfeb magnets: powerful magnets: ( Strong powerful magnets:) Material manufacturing process: sintered ndfeb strong magnet: powerful magnets: materials using the powder metallurgy technology, melting metal powder and in the field of medium voltage after pressing, pressing in inert gas or vacuum sintering densification, in order to improve the magnet coercive force, usually need to be aging heat treatment. 7 sintered ndfeb strong magnet: ( Strong powerful magnets:) Powerful magnets: material application of sintered ndfeb strong magnet: powerful magnets: excellent magnetic materials, widely used in electronics, electricity, machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields, is one of the more common with strong magnets: motor, speaker, magnetic separator, computer disk drives, magnetic resonance imaging equipment instrument on an article: the main factors influencing the magnet price next up: the reason of magnetic coating peeling and what is the cause of the rust spots?
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