DongGuan Courage Magnetoelectric Technology Co.,Ltd

Magnet FAQ

What magnetic tile materials are commonly used in permanent magnet motors?

Comprehensive analysis of motor magnets: The common permanent magnet materials used in motor include sintered magnet and bonded magnet. The main types are Al-Ni-Co, ferrite, samarium-Co, Nd-Fe-B and so on.
 
Aluminum-nickel-cobalt: Aluminum-nickel-cobalt permanent magnet material is one of the earliest widely used permanent magnet materials. Its preparation technology and technology are relatively mature. At present, there are factories in Japan, the United States, Europe, Russia and China. Among large-scale production enterprises, Hangzhou Permanent Magnet's output is currently the first in China, with an annual capacity of 3000 tons.
 
Permanent magnet ferrite materials: In the 1950s, ferrite began to flourish, especially in the 1970s, strontium ferrite with good coercivity and magnetic energy machine performance was put into production in large quantities, rapidly expanding the use of permanent magnet ferrite. As a non-metallic magnetic material, ferrite is very popular because it does not have the disadvantages of metal permanent magnet material such as easy oxidation, low Curie temperature and high cost.
 
Samarium-Cobalt Material: A permanent magnet material with excellent magnetic properties, which emerged in the mid-1960s, and its performance is very stable. Samarium cobalt is especially suitable for manufacturing motors in terms of magnetic properties, but because of its high price, it is mainly used in 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.
 
Nd-Fe-B Material: Nd-Fe-B magnetic material is an alloy of Nd, FeO, etc., also known as magnet steel. Nd-Fe-B permanent magnets have been widely used in modern industry and electronic technology due to their high magnetic energy product, high energy density and so on, which makes it possible to miniaturize, lightweight and thin the instruments, electro-acoustic motors, magnetic separation and magnetization equipment. It is easy to rust because it contains a lot of neodymium and iron. Surface chemical passivation is one of the best solutions at present.
 
Corrosion Resistance, Maximum Working Temperature, Processing Performance, Demagnetization Curve Shape and Price Comparison of Permanent Magnet Materials Used in Motor (Figure)
A brief overview of four magnet materials:


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