What are Permanent Magnets?

Most of us have heard of permanent magnets, and even used them, yet when asked what a permanent magnet is, how many types of permanent magnets there are, and what their applications are, few can give a clear answer.Therefore, in today's article, we will try to answer the above questions one by one.

First, let's clarify what a permanent magnet is.
A magnet that can maintain its magnetism for a long time is called a permanent magnet, such as natural magnets (magnetite) and artificial magnets.

Permanent magnets are not easily demagnetized or magnetized, and their polarity does not change. However, if a permanent magnet is heated above its Curie temperature or is in an environment with a high reverse magnetic field strength, its magnetism will weaken or disappear.

Some permanent magnets are relatively brittle and may break at high temperatures. For example, the maximum operating temperature of Alnico magnets exceeds 540 °C (1,000 °F), while the maximum operating temperature of samarium cobalt and ferrite magnets is approximately 300 °C (570 °F), and the maximum operating temperature of neodymium magnets and soft magnets is approximately 140 °C (280 °F).

How many types of permanent magnets are there?
The first type of permanent magnet is alloy permanent magnet materials, including rare earth permanent magnet materials, such as Nd2Fe14B, SmCo, and AlNiCo.

The second type of permanent magnet is ferrite permanent magnet materials. Ferrite permanent magnet materials can be divided into sintered ferrite, bonded ferrite, and injection-molded ferrite according to their different production processes.

In addition, Cu-Ni-Fe, Fe-Co-Mo, Fe-Co-V, MnBi, and A1MnC alloys have historically been used as permanent magnet materials. However, due to the lower performance and higher cost of these alloys, they are rarely used in most applications.

Related reading: Neodymium Iron Boron Magnets

What are the applications of permanent magnets?

Permanent magnets have a wide range of applications. For example, you can find them in televisions, speakers, radios, handbag clasps, data cable magnetic rings, computer hard drives, and mobile phone vibrators. In short, permanent magnets are everywhere in people's lives, greatly facilitating our production and life. Conclusion

Thank you for reading this article. We hope it has helped you better understand permanent magnets, their types, and applications.

If you would like to learn more about permanent magnets, we encourage you to visit our website. As a leading global supplier of magnets, we are dedicated to the research, development, manufacturing, and sales of permanent magnets, and we provide our customers with high-quality rare earth permanent magnet products, such as neodymium magnets, as well as other non-rare earth permanent magnets.