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The classification of the magnet

by:Newland     2020-04-07
Magnet is indispensable for a lot of factory production of products, but to choose to match their product magnets will need to know the magnet classification and characteristics of city magnetic technology co. , LTD. Small make up today to explain one by one. A classify the type of magnets, magnet, there are many, but is usually divided into two categories, permanent magnetic and soft magnetic, generally we say of magnets, is refers to the permanent magnet, permanent magnet and in two categories: the first is: metal alloy material Nd2Fe14B) magnet consists of ndfeb magnet , samarium cobalt magnet ( SmCo) , aluminum nickel and cobalt magnet ( ALNiCO) 。 1, ndfeb strong magnet: this is the highest magnet in the know at this stage of commercialization performance index, known as the king of magnetic, has the very high magnetic the maximum magnetic energy ( BHmax) Above ferrite ( Ferrite) More than 10 times, its mechanical processing manufacturing feature is also very good, the work environment temperature up to 200 degrees Celsius, and the quality of a material is solid, stable performance and good cost performance, therefore, its application field is very wide, but because of its strong chemical activity, so we need the correct processing (surface layer with polish layer Such as zinc plating, Ni, electrophoresis, passivation, etc. ) 。 2, alnico magnets, is made from aluminum, nickel, cobalt, iron and other trace metal elements of an alloy, casting process to processing and manufacturing into different sizes and shapes, machinability is good, processing aluminum nickel and cobalt permanent magnet has the lowest temperature coefficient is reversible, working temperature can be as high as 600 degrees Celsius above, aluminum nickel and cobalt permanent magnet products application field widely applied to various instrumentation and other industries. 3, samarium cobalt, SmCo) According to different ingredients into SmCo5 and Sm2Co17. Because of its raw material is expensive so that its development prospects are restricted, samarium cobalt ( SmCo) As a rare earth permanent magnets, not only has high magnetic energy product ( 14 - 28 mgoe) , the coercive force and good temperature characteristics of a safe and reliable, compared with ndfeb magnets, samarium cobalt magnet is more suitable job in high temperature environment. The second category is: ferrite permanent magnet materials ( Ferrite) 1, ferrite magnet: it mainly raw materials including BaFe12O19 and SrFe12O19. Using the method of ceramics production, quality of a material is relatively hard, brittle material, because of the ferrite magnet has a very good temperature resistance, low cost, moderate performance, application field has become the most common permanent magnet. A: magnetic material under the analogy of a: common problems about ndfeb strong magnet application
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