Judge the quality of neodymium iron boron magnets

Posted by arewmagt on April 6th, 2021

Neodymium iron boron magnets have now been widely used in the electronics industry, automobile industry, petrochemical industry, micro-special motors, permanent magnet instruments, nuclear magnetic resonance devices, sensors, audio equipment, magnetic levitation systems, magnetic transmission mechanisms and magnetic equipment. Because NdFeB magnets have excellent properties, abundant raw materials, and reasonable prices, NdFeB magnets have been promoting the widespread and rapid spread of NdFeB magnets. So what should we pay attention to when purchasing neodymium iron boron magnets, and how to judge whether it is good or bad?

First of all, we have to know what combination of materials it is made of. The main raw materials of neodymium iron boron permanent magnets are rare earth metal neodymium (Nd) 32%, metal element iron (Fe) 64% and non-metal element boron (B) 1% (a small amount of added dysprosium (Dy), terbium (Tb), cobalt (Co), niobium (Nb), gallium (Ga), aluminum (Al), copper (Cu) and other elements). The neodymium iron boron ternary system permanent magnet material is based on the Nd2Fe14B compound, and its composition should be similar to the molecular formula of the compound Nd2Fe14B. However, when the Nd2Fe14B is completely in the distribution ratio, the magnetic properties of the magnet are very low, or even non-magnetic. Only when the content of neodymium and boron in the actual magnet is higher than the content of neodymium and boron in the Nd2Fe14B compound can better permanent magnetic properties be obtained. The characteristics of neodymium iron boron determine the quality and value of neodymium iron boron magnets. From the main raw materials of neodymium iron boron above, neodymium iron boron is a kind of magnetic material. It has extremely high performance, moderate price, and high strength, but It is not resistant to high temperature and corrosion.

Because the combination of NdFeB materials is very reasonable, it makes NdFeB permanent magnets with eternal magnetic properties. The neodymium iron boron magnet has high coercivity, the magnetic field under the general conditions of natural environment and magnetic loss will not change or lose its magnetism. After long-term use, the magnetic loss is too large, so it is in the process of use, generally ignore the influence of time on the magnetic performance. NdFeB magnets have such high magnetic properties, making them more widely used, and there are more and more manufacturers of NdFeB magnets. Now that we understand the properties of NdFeB magnets, we can use them to distinguish whether it is good or bad, so that we can make reasonable purchases of NdFeB magnets. We can use some iron products to test the magnetism of NdFeB. If the material is good enough, the magnetism will be great, and the attractive force of natural magnets will be great, from which we can judge whether there is any cutting corners. If we want to buy neodymium iron boron magnets on a large scale, we can also judge whether it is good or bad by testing its magnetic properties.