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The reason _ about the worse performance of bonded magnet ndfeb strong magnet manufacturers

by:Newland     2020-03-29
The reasons of the difference of bonded magnets bonded magnet is certain the performance of permanent magnet magnetic powder mixed with a certain percentage of the binder, according to certain molding process is made of a magnet. If a magnetic field exerts in the process of forming orientation, make easy magnetization direction of the magnetic powder in the magnets in the same direction, this is anisotropic bonded magnet, otherwise it is isotropic magnet. Bonded magnets forming method is varied, including molding, injection molding, extrusion forming and rolling forming, etc. Bonded magnets than sintering neodymium magnet magnetic difference as we all know, but the reason? If you can speak just a little, share with you about the worse performance of bonded magnets today for two reasons. First of all, bonded magnet is isotropic, namely regardless of magnet magnetization direction magnetic field intensity are the same ( And related to the shape) 。 But sintered magnets is anisotropic magnets, in the process of production of sintered magnets, a process known as magnetic field orientation, so only the direction of the magnetization orientation can be magnetized and has a high magnetic field intensity, other direction cannot be magnetized and no magnetic force. In theory, the isotropic magnet remanence only half as much as that of the anisotropic magnets because energy is proportional to the square of the product and the remanence, so the anisotropy of the anisotropic magnet magnetic is four times the size of the isotropic magnet. Second, bacuse bonded magnets containing adhesive, the actual density is only 80% of the theoretical density, so the bonded magnet magnetic attenuation can be around 30%. Together, bonded ndfeb magnets, magnetic only about one 5 of the sintered magnet. The sintered ndfeb magnet magnetic energy product can reach more than 50 m, and bonded magnets in under 10 m, usually the best and only 12 m. Bonded magnets, magnetic powder used in the performance of the general is 15 m, bonded magnet after only up to 10. 文献。 Bonded magnet is used mainly for the micro motor, stepping motor, magnetic ring, all kinds of toys. Above is about the worse performance of bonded magnets for two reasons, net finishing editing by strong magnet manufacturer.
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