As for bonded NdFeB and sintered NdFeB, small editors have introduced them a lot. Next, small editors will introduce the differences between bonded NdFeB and sintered NdFeB, and see what specific differences they have in production and processing technology, density and magnetic force. Interested friends can see the following articles:
In fact, both of them belong to NdFeB. The two kinds of magnets are distinguished according to their different production processes. Bonded NdFeB is actually molded by injection molding, while sintered NdFeB magnets are molded by high temperature heating after being evacuated.
Because bonded NdFeB magnets are molded by injection molding, they contain adhesives, of which the density is generally only 80% in theory. The sintered NdFeB magnets are heated by complex processes at high temperature. Therefore, in terms of magnetism, the bonded NdFeB decreases about 30% compared with the sintered NdFeB magnets.
Sintered NdFeB is an anisotropic magnet produced by powder sintering. Generally, after sintering, only the blanks can be produced and then machined (such as wire cutting, slicing, grinding, etc.) to become magnets of various shapes. Sintered Nd-Fe-B is a kind of brittle and hard material, which is difficult to be processed. In the process of processing, the loss is large, the cost is high, the dimensional accuracy is poor, and the surface with poor corrosion resistance needs to be electroplated. However, it has the advantage of high performance, which is over 50m at present.
The magnetic properties of bonded NdFeB magnets are only about 5% of that of sintered magnets. At present, the magnetic energy product of sintered NdFeB magnet can reach more than 50m, while that of bonded magnet is generally less than 10m, and that of good magnet is only 12m. The performance of the magnetic powder used for bonding magnet is generally 15m, which is only 10.5m after it is made into bonding magnet.
The above is an introduction to the difference between bonded NdFeB and sintered NdFeB in production and processing technology, density and magnetic force. The price of bonded NdFeB will be much cheaper. Due to the material fluctuation, you are welcome to contact the business for consultation. In addition, the batch production of bonded NdFeB requires a mold, while sintered NdFeB is not needed.
