1. What are the types of magnets?

Classification by attributes: neodymium iron boron magnet (strong magnet), ferrite magnet, Samarium–cobalt magnet, aluminum nickel cobalt magnet, iron chromium cobalt magnet.

2. Which type of magnet has the best magnetic properties?

The answer is neodymium iron boron strong magnets, which belong to the third generation rare earth permanent magnets and are also known as strong magnets or magnetic kings. Its magnetic properties are far higher than ferrite, aluminum nickel cobalt, Samarium–cobalt magnet, and it is the magnet with the best performance price ratio so far.

3. Maximum operating temperature of magnets made of different materials

The maximum operating temperature of different magnets varies. Generally speaking, the maximum operating temperature of a magnet refers to the irreversible loss of permanent magnet magnetism beyond this temperature. Ferrite permanent magnet 450 ℃, neodymium iron boron 310 ℃, samarium cobalt 750 ℃, aluminum nickel cobalt 850 ℃.

4. How long is the lifespan of a permanent magnet?

In theory, the lifespan of a permanent magnet is permanent, but the actual working environment is different from the experiment. There are two main factors that affect the lifespan of magnets: corrosion and demagnetization. Like neodymium iron boron magnets, they are easily corrosive magnetic materials that require electroplating and surface anti-corrosion treatment. If not treated with anti-corrosion, it may quickly oxidize and even turn into powder.

Another convenience is demagnetization, as demagnetization of a permanent magnet can affect its service life, and even if it is magnetized again, it may not achieve its previous performance.