The permanent magnet materials commonly used in motors include sintered magnets and bonded magnets. The main types are AlNiCo, ferrite, samarium cobalt, neodymium iron boron and so on.
Ⅰ. AlNiCo Magnet
Alnico permanent magnet material is the earliest widely used permanent magnet material, and its preparation process and technology are relatively mature. Currently, there are factories in Japan, the United States, Europe, Russia, and China. Meank, as a professional magnet supplier, can provide high-quality AlNiCo magnets (China). Welcome to purchase.
Ⅱ. Permanent ferrite material
In the 1950s, ferrite began to develop vigorously. Especially in the 1970s, strontium ferrite with better performance in coercivity and magnetism was put into production in large quantities, rapidly expanding the use of permanent ferrites. As a non-metallic magnetic material, ferrite does not have the disadvantages of metal permanent magnet materials, which are easy to oxidize, low Curie temperature, and high cost, so it is quite popular.
Ⅲ. Samarium Cobalt Material
Permanent magnet materials with excellent magnetic properties emerged in the mid-1960s, and their properties are quite stable. Samarium cobalt is particularly suitable for manufacturing motors in terms of magnetic properties, but because of its high price, it is mainly used for research and development of military motors such as aviation, aerospace, weapons and high-performance motors in high-tech fields where price is not the main factor.
Ⅳ. Neodymium iron boron material
NdFeB magnetic material is an alloy of neodymium, iron oxide also known as magnet steel. With extremely high magnetic energy product and coercive force, and the advantages of high energy density, NdFeB permanent magnet materials have been widely used in modern industry and electronic technology, so as to make instrumentation, electro-acoustic motors, magnetic separation magnetization and miniaturized, weight-reduced and thinning equipment are possible. Because it contains a lot of neodymium and iron, it is easy to rust, therefore surface chemical passivation is one of the current good solutions.