How to Distinguish between Bonded NdFeB and Sintered NdFeB?


How to Distinguish between Bonded NdFeB and Sintered NdFeB?

Neodymium magnet can be called Neodymium iron boron magnet, the general name of powerful magnet.It is a kind of artificial permanent magnet, and its chemical formula is Nd2Fe14B.So far it has the strongest magnetic force of permanent magnet.The brand is from N35 to N52.The shape can be processed according to specific requirements.

How to distinguish between bonded ndfeb and sintered ndfeb?In fact, the both are ndfeb.The two kinds of magnets are classified according to their production process.Bonded ndfeb is actually through injection molding,while sintered ndfeb magnet is used by pumping out and then through high temperature heating and molding.

Bonded ndfeb magnets contain adhesive, and the density is generally only 80 percent of the theoretical.In the magnetic, Comparing with sintered ndfeb,bonded ndfeb will decay about 30 percent.

Sintered ndfeb has the high performance,which has reached more than 50M at present.But it is a kind of hard and brittle material that is difficult to process. It is with high loss, high cost and poor dimensional accuracy.Besides,due to poor corrosion resistance,it needs electroplating treatment on the surface.However, the magnetic energy product of bonded ndfeb magnets are generally below 10M.Therefore, sintered ndfeb generally is more widely used than bonded ndfeb.


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