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What is the difference between bonded NdFeB magnet and sintered NdFeB magnet?
Publication Time:
08 Jul,2020
Neodymium iron boron magnets are a kind of artificial permanent magnets collectively called powerful magnets, which can be divided into bonded neodymium iron boron and sintered neodymium iron boron due to different production processes. What is the difference between these two types of magnets? Now, let us tell you from Shanxi iron-absorbing stone manufacturers.
Neodymium iron boron magnets are a kind of artificial permanent magnets collectively called powerful magnets, which can be divided into bonded neodymium iron boron and sintered neodymium iron boron due to different production processes. What is the difference between these two types of magnets? Now, let us tell you from Shanxi iron-absorbing stone manufacturers.
The two types of magnets are distinguished according to their production processes. The bonded NdFeB magnet is actually formed by injection molding, while the sintered NdFeB magnet is formed by evacuation and heating at high temperature.
Bonded neodymium iron boron magnets are formed by injection molding, so they contain adhesives, the density of which is generally only 80% of the theoretical. The sintered NdFeB magnet is heated at a high temperature through a complicated process. Therefore, the bonded NdFeB magnet is attenuated by about 30% compared with the sintered NdFeB magnet.
In summary, the magnetic properties of bonded NdFeB magnets are only about 5% of that of sintered. At present, the energy product of sintered NdFeB magnets can reach more than 50M, while bonded magnets are generally below 10M, and the best one is only 12M. The performance of the magnetic powder used in the bonded magnet is generally 15M, and the bonded magnet is only 10.5M at most. Therefore, sintered NdFeB is generally used in a wider range than bonded NdFeB.
The above is the comparison between bonded NdFeB magnets and sintered NdFeB magnets. Do you know the difference? If you want to know more about magnets, you can come to our company's official website to directly consult our Shanxi magnet magnet manufacturer.