Aluminum nickel cobalt (Alnico) is the earliest permanent magnet material developed. It is a alloy composed of aluminum, nickel, cobalt, iron, and other trace metal elements. According to different production processes, it is divided into sintered aluminum nickel cobalt (Sinteered Alnico) and cast aluminum nickel cobalt (Cast Alnico). The shape of the product is mostly round and square. The casting process can be processed and produced into different sizes and shapes; compared with the casting process, sintering products are limited to small sizes, and the blank size tolerance is better than the blanking of the cast product. Machining is good. In the permanent magnet material, the cast aluminum nickel cobalt permanent magnet has a minimum reversible temperature coefficient, and the operating temperature can be as high as 600 ° C. Aluminum nickel cobalt permanent magnet products are widely used in various instrument and other applications.

The） cobalt (SMCO) is divided into SMCO5 and SM2CO17 according to the different ingredients, respectively, and the pyramid and second -generation rare earth permanent magnet materials. Because of its scarce raw materials and expensive prices, it has restricted its development. As a second-generation rare earth permanent magnet, the SMCO (SMCO) not only has high magnetic energy accumulation (14-28mgoe) and reliable stubborn power, but also shows good temperature characteristics in the rare earth permanent magnet series. Compared with tanning iron boron, 更 cobalt is more suitable for working in high temperature environments (> 200 ° C).