Magnets can be divided into "permanent magnets" and "non permanent magnets".

What is a permanent magnet?

As the name suggests, it is an object that can maintain its own magnetism for a long time without an external magnetic field. Generally, it can be maintained for more than 10 years. In ancient times, permanent magnets were all natural products, also known as natural magnets, but with the advancement of technology today, humans can also manufacture permanent magnets.

Permanent magnets can be divided into two categories

Metal alloy magnet

Including samarium cobalt magnets (SmCo), aluminum nickel cobalt magnets (ALNiCO), iron chromium cobalt magnets (FeCrCo), etc

Among them, iron chromium cobalt magnets are known as transformers in permanent magnets, and alloy permanent magnets are the most deformable. They can be used for wire drawing (0.2-0.3mm), tube drawing, strip rolling, and various mechanical processing, and can be made into various complex shaped permanent magnet components, especially for small, long and thin components, showing unique characteristics. The thinnest strip can reach 0.05mm, and the thinnest wire can be processed to 0.1mm.

Ferrite permanent magnet

Neodymium iron boron magnet (Nd2Fe14B), samarium cobalt (SmCo), aluminum nickel cobalt magnet, etc

The first discovered magnet in ancient times (iron trioxide) also belongs to the category of ferrite permanent magnets.

At present, the most widely used are neodymium iron boron magnets and ferrite permanent magnets!