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What are the strengths and weaknesses of the ndfeb permanent magnet material, harmful to human body? _ ndfeb strong magnet manufacturers

by:Newland     2020-04-03
Ndfeb permanent magnet material has high energy product and high coercive force and good stability, suitable for making tiny, highly efficient permanent magnet device. Ndfeb permanent magnet materials have 32% rare earth neodymium metal, metal elements of iron and boron nonmetal elements 64% and 1%. The third generation of rare earth permanent magnet ndfeb permanent magnets is strongest performance in contemporary magnet. Its BHmax value is 5 - ferrite magnets 12 times, is the 3 - alnico magnets 10 times; 5 - its coercive force of ferrite magnets 5-10 times, aluminum nickel and cobalt magnet 15 times, its high potential magnetic, can suck up the equivalent of a weight of 640 times its own weight. Advantage: the ndfeb permanent magnet material has high energy product and high coercive force and good stability, suitable for making tiny, highly efficient permanent magnet device. It is widely used in electrical, electro-acoustic, magnets, magnets and other disadvantages: the deficiency of ndfeb magnet is its poor performance temperature, at high temperatures using magnetic loss is bigger, the highest working temperature is low. General is 80 degrees Celsius, after special processing of the magnet, the highest working temperature can reach 200 degrees Celsius. Due to the material contains a large number of neodymium and iron, so easy to rust is also a major weakness of it. So the ndfeb magnets must be surface coating treatment. Nickel plating ( Ni) And zinc ( 锌) , gold ( Au) Chromium, ( Cr) , epoxy resin ( 环氧树脂) And so on. All the year round in contact with the magnet, is harmless to the human body. But should pay attention to when using points: one is in a strong magnetic, pay attention to the hand not to be clamped; The second is to prevent over its working temperature, the brand is not the same; Three is ndfeb material brittle, fragile, must pay attention to when using the touch. If considering looking for this kind of material is to find on some of the best suppliers, can go to find material ask contrast material.
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