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Ndfeb magnet quality can how to judge

by:Maghard      2020-09-16
Ndfeb magnet is now widely used in electronic industry, automobile industry, petrochemical industry, micro motors, permanent magnet instrument, nuclear magnetic resonance (NMR) devices, sensors, audio equipment, magnetic suspension system, magnetic transmission mechanism, and magnetic devices. Because ndfeb magnets have excellent performance, abundant raw material, the price is very reasonable, has been pushing ndfeb magnet is spread widely and quickly. Then we ndfeb magnet should pay attention to what the choose and buy, it is good or bad, how to judge? Shenzhen today to just force constant magnets with a recruit for everybody! First, we need to know what it is made of material combination is made and be become. The main raw materials ndfeb permanent magnets have rare earth metal neodymium ( Nd) 32%, iron metal elements ( Fe) 64% boron and nonmetallic elements ( B) 1% ( A small amount of added dysprosium ( Dy) , terbium ( Tb) , cobalt, Co) , niobium, Nb) , gallium, Ga) , aluminum ( Al) , copper, Cu) Elements such as) 。 Ndfeb permanent magnetic material based on Nd2Fe14B ternary compound as matrix, its content should be close to compound Nd2Fe14B formula is. But according to Nd2Fe14B composition ratio in full, magnets, magnetic can is very low, even no magnetic. Only actual of neodymium magnets and boron content than Nd2Fe14B compounds and neodymium boron content to get better performance of permanent magnet. Summary of quality determines the quality and value of ndfeb magnets, from the above summary of the main raw materials, the ndfeb belongs to a kind of magnetic material, its performance is extremely high, moderate price, and the intensity is high, but it is not resistant to high temperature and corrosion. Because ndfeb material combination is very reasonable, so making nd-fe-b permanent magnetic properties. Ndfeb magnet with a high coercive force, the natural environment and the general conditions of magnetic field of magnetic loss will not change or lose magnetism. After long-term use, magnetic loss is too big, so it is in the process of use, time factor's influence on the magnetic can generally ignored. With such high magnetic ndfeb magnet, make it more widely, ndfeb magnet manufacturers also more and more. Since after understanding the performance of ndfeb magnets have how well we can be used to identify it, so can the choose and buy of the ndfeb magnets in a reasonable manner. We can use some iron products of ndfeb magnetic testing, if the material is good enough magnetic also will be very big, natural magnet appeal is very big, from which we can judge the jerry-built situation does exist. If we want to mass purchase of ndfeb magnet, also can pass the test of magnetic magnetic to judge good or bad. Ndfeb magnet is mainly has three parameters: remanence Br ( 剩余感应) Gauss, units, and removed from saturated magnetic field, after the rest of the magnetic flux density, on behalf of the foreign can provide the magnet magnetic field strength; Coercive force Hc ( 矫顽力) Oersteds, unit, is to put the magnets in a reverse adscititious magnetic field, when applied magnetic field increases to a certain intensity magnet magnetic disappears, the resistance and the ability of the magnetic field is called the coercive force, represents a measure of resistance to demagnetization ability; Gauss - magnetic energy product BHmax, units Oersteds, is material produced by the magnetic energy per unit volume, how much is the magnet can store energy of a physical quantity. We can to standard check of these three values, which can be learned that ndfeb magnet quality high and low. Ndfeb magnet when the choose and buy, we can through the professional test equipment for testing. Sometimes some equipment need high performance ndfeb magnets, ndfeb magnets, so you need to improve the quality, natural when buy should pay attention to these problems.
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