Six questions about permanent magnet materials you are most concerned about!

1.What are the types of permanent magnets?
Permanent magnet materials are divided into two categories:

The first category is alloy permanent magnet materials including rare earth permanent magnet materials (NdFeB Nd2Fe14B), samarium cobalt (SmCo), and neodymium nickel cobalt (NdNiCO).

The second category is ferrite permanent magnet materials (Ferrite).

2.Which magnet has the best magnetic properties?
The answer is NdFeB magnets, which 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 by far the most cost-effective magnet.

3.What is the maximum working temperature of magnets of different materials?
Different magnets have different maximum operating temperatures. Generally speaking, the maximum working temperature of the magnet means that beyond this temperature, the magnetic properties of the permanent magnet will be irreversibly lost.

Ferrite permanent magnet: 450℃ NdFeB: 310℃ Samarium Cobal: 750℃ AlNiCo: 850℃.

Six questions about permanent magnet materials you are most concerned about!

Six questions about permanent magnet materials you are most concerned about!

4.How long is the life of the permanent magnet?
Theoretically, the life of permanent magnets is permanent, but the actual working environment is different from the experiment. There are two main factors that affect the life of a magnet: corrosion and demagnetization.

Like NdFeB magnets, it is a kind of magnetic material that is easy to corrode and must be electroplated and surface anti-corrosion treatment. Without preservative treatment, it may quickly oxidize and even turn into powder.

Another aspect is demagnetization, which will affect its service life after demagnetization, and may not reach the previous performance even if it is re-magnetized.

5.What material is the magnet made of?
There are many types of magnets, and different types of magnets are made of different materials. The main components of ordinary ferrite magnets are Fe3O4, and the components of NdFeB magnets are mainly 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 magnets are alloys composed of trace metal elements such as aluminum, nickel, cobalt, and iron.

6.What are the application fields of permanent magnets?
Permanent magnet materials are widely used in energy, information and communication, transportation, computer, medical equipment, and many other industries.

In recent years, permanent magnet materials have shown superior performance in energy-saving home appliances, hybrid electric vehicles, pure electric vehicles, wind power, hydropower, and other fields, attracting more and more attention.

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