1. What are the types of magnets?
Classification by properties: NdFeB magnets (strong magnets), ferrite magnets, samarium cobalt magnets, alnico magnets, iron chrome cobalt magnets.
Classification by shape: round magnets, square magnets, tile-shaped magnets, special-shaped magnets, cylindrical magnets, etc.
2. Which type of magnet has the best magnetic properties?
NdFeB strong magnets belong to the third generation of rare earth permanent magnets, also known as strong magnets or magnetic kings. Its magnetic performance is much higher than that of ferrite, AlNiCo and Samarium Cobalt magnets, and it is the magnet with the best performance-to-price ratio so far.
3. The maximum working temperature of magnets of different materials
The maximum working temperature of different magnets is different. Generally speaking, the maximum working temperature of the magnet means that beyond this temperature, the magnetism of the permanent magnet will be irreversibly lost. Ferrite permanent magnet 450℃, NdFeB 310℃, Samarium Cobalt 750℃, AlNiCo 850℃.
4. How long is the life of the permanent magnet?
Theoretically, the permanent magnet life is permanent, but the actual working environment is different from the experiment. There are two main factors affecting the life of magnets: corrosion and demagnetization. Like NdFeB magnets, which are easily corroded magnetic materials, electroplating and surface anti-corrosion treatment must be done. Without preservative treatment, it may quickly oxidize and even turn into powder.
Another convenience is demagnetization. Demagnetization of the permanent magnet will affect its service life. Even if it is magnetized again, it may not reach the previous performance.
5. Common processing technology of magnets
Common processing methods include wire cutting, grinding, chamfering, electroplating, drilling, etc.
6. What material is the magnet made of?
There are many types of magnets, and the composition materials of different types of magnets are also different. Common ferrite magnets are mainly composed of Fe3O4, and NdFeB magnets are mainly composed of neodymium, iron, boron and other rare earth metals such as dysprosium (Dy) and praseodymium (Pr). The main components of samarium cobalt magnets are rare earth samarium, cobalt, iron, copper and zirconium. AlNiCo permanent magnet is an alloy composed of metal aluminum, nickel, cobalt, iron and other trace metal elements.
7. What is the role and function of the permanent magnet
Magnets are widely used, such as: permanent magnet motors, sensors, speakers, generators, magnetic therapy, hardware toys, etc.