Time:12/19/2018 1:59:25 PMauthor:source:
Classification of permanent magnets
The first major categories are: metal alloy magnets including NdFeB magnets Nd2Fe14B), SmCo magnets (SmCo), AlNiCo magnets (ALNiCO)
The second major category is: ferrite permanent magnet material (Ferrite)
1. Neodymium iron boron magnet: It is the magnet with the highest commercialization performance. It is called magnetic king. It has extremely high magnetic properties and its maximum magnetic energy product (BHmax) is more than 10 times higher than ferrite. Its mechanical processing performance is also quite good. Operating temperatures up to 200 degrees Celsius. Moreover, its texture is hard, its performance is stable, and it has a good cost performance, so its application is extremely extensive. However, because of its strong chemical activity, it must be treated with a surface coating. (such as Zn, Ni, electrophoresis, passivation, etc.).
2. Ferrite magnet: Its main raw materials include BaFe12O19 and SrFe12O19. It is made of ceramic technology and has a relatively hard texture. It is a brittle material. Because ferrite magnets have good temperature resistance, low price and moderate performance, they have become the most widely used permanent magnets.
3. AlNiCo magnet: An alloy consisting of aluminum, nickel, cobalt, iron and other trace metals. The casting process can be processed into different sizes and shapes, and the processability is very good. Cast AlNiCo permanent magnets have the lowest reversible temperature coefficient and can operate at temperatures above 600 degrees Celsius. AlNiCo permanent magnet products are widely used in a variety of instrumentation and other applications.
4. SmCo is classified into SmCo5 and Sm2Co17 depending on the composition. Its development is limited due to the high price of its materials. Samarium Cobalt (SmCo), as a rare earth permanent magnet, not only has a high magnetic energy product (14-28 MGOe), reliable coercivity and good temperature characteristics. Compared with neodymium iron boron magnets, samarium cobalt magnets are more suitable for working in high temperature environments.
Copyright © Huizhou Zhiyan Magnetic Materials Co., Ltd. ICP1702657
Magnet:Magnet Sitemap(sitemap.html sitemap.xml)
Links