What is sintered neodymium magnet?
Apr 16 , 2022
What is sintered neodymium magnet?
1.Manufacturing porcess:
The sintered NdFeB permanent magnet adopts a powder metallurgy process. The smelted alloy is made into powder and pressed into a compact in a magnetic field. The compact is sintered in an inert gas or vacuum to achieve densification. In order to improve the coercivity of the magnet,usually requires an aging heat treatment.
2.Chemical Composition:
The sintered NdFeB permanent magnet is based on the intermetallic compound ND2FE14B. The main components are rare earth (Nd),iron (Fe),boron (B). Among them,rare earth Nd can be partially replaced by other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) in order to obtain different properties. Iron can also be partially replaced by other metals such as cobalt (Co) and aluminum (Al).
3.Magnetic Performance Index：
Remanence (Br),Coercive Force (Hcb),Intrinsic Coercive Force (Hcj),Maximum Magnetic Energy Proudct ((BH)max),these four parameters are the core parameters to distinguish the performance of sintered NdFeB Magnets.
4.Classification and Grades:
According to the different intrinsic coercive force (Hcj),the sintered NdFeB permanent magnet are classified into N,M,H,SH,UH,EH,AH seven series of products. The temperature resistance increases with greater intrinsic coercive force,from 80 degrees Celsius to 220 degrees Celsius.
On the basis of different value of the maximum magnetic energy product ((BH)max),each series of product is divided into several grades.Such as N35-N55,N35M-N52M,N33H-N50H,N30SH-N45SH,N20UH-N45UH,N28EH-N42EH,N30AH-N38AH. The magnetic power increases with greater maximum magnetic energy product ((BH)max).
Check the grade/properties of sintered neodymium magnet
5.Features：
●It is the strongest commercially available magnets in the world.
●With good machining performance,can be made into round,block,ring,arc,irregular and customized shapes and sizes.
●The surface needs electroplating treatment to improve the anti-corrosion and anti-rust ability.
6.Application Range:
Sintered NdFeB permanent magnet have excellent magnetic properties and are widely used in electronics,electrical machinery,medical equipment,toys,packaging,hardware machinery,aerospace and other fields. The more common ones are permanent magnet motors,speakers,magnetic separators,computer disk drives,magnetic resonance imaging equipment meters,etc.
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