ferrite magnets
What is rare earth permanent magnet material? Why is it so important?
Jul 28,2021.

Talking about rare earths is inseparable from rare earth permanent magnet materials. What is rare earth permanent magnet material? Today we will come to popular science.

First, let's understand what is a permanent magnet material?

Refers to materials that can maintain constant magnetic properties once they are magnetized, and are widely used in high technology. Those who have studied high school physics know that magnetic energy generates electricity, commonly known as "electromagnetic induction" phenomenon, and the principle of modern generators is derived from this. Permanent magnet materials can provide constant magnetism and provide a constant energy basis for motor operation.

Why are rare earth permanent magnets so precious?

Rare earth permanent magnet, that is, the permanent magnet material contains rare earth metal elements. At present, the well-known rare earth permanent magnet materials are mainly rare earth cobalt permanent magnet materials and neodymium iron boron permanent magnet materials. Rare-earth permanent magnet materials are currently known as a permanent magnet material with the highest comprehensive performance.

The magnetic energy product of cobalt permanent magnets can reach 150 times that of carbon steel, 3 to 5 times that of Alnico permanent magnets, and 8 to 10 times that of permanent magnet ferrites. Neodymium iron boron magnets have extremely high magnetic energy and are called the contemporary "king of permanent magnets". They are widely used in electronics, machinery and other industries with their excellent performance.

Due to the use of rare earth permanent magnetic materials, not only has promoted the miniaturization of permanent magnetic devices and improved the performance of products, but also promoted the production of some special devices, which has the effect of becoming gold.

rare earth neodymium magnets

What is the role of rare earth permanent magnets?

Rare earth permanent magnet materials have become important materials in electronic technology communications:

In the field of military science and technology, it can be used to build artificial satellites, radars, and aviation instruments.

It is also ubiquitous in daily life, and has penetrated into automobiles, household appliances, electronic meters, nuclear magnetic resonance imagers, audio equipment, micro-special motors, mobile phones, etc.

In the medical field, the use of rare earth permanent magnet materials for "magnetic acupuncture therapy" has greatly improved the curative effect and promoted the rapid promotion of "magnetic acupuncture therapy".

The most obvious application of rare earth permanent magnets in recent years is in the field of new energy. New energy vehicles, wind power generation, and air conditioners will all be applied to this material.

Rare earth permanent magnetic tape drive rare earth demand explodes

According to agency estimates, by 2025, the demand for high-performance neodymium-iron-boron for new energy vehicles will exceed 60,000 tons. On the other hand, under the constraints of new energy efficiency standards, the penetration rate of NdFeB in the domestic home appliance industry continues to increase. It is expected that the annual growth rate of magnetic materials for air-conditioning will continue to exceed 60% in 2021-2022.

Because of the increasing demand for rare earth permanent magnets, the prices of rare earth permanent magnet raw materials have risen. According to the data from Magnet.com, in early July, the raw materials of rare earth permanent magnets all rose to varying degrees. Among them, neodymium praseodymium oxide rose by 5,000 yuan, and the average price reached 487,500 yuan/ton; neodymium praseodymium metal rose by 15,000 yuan, and the average price reached 602,500 yuan. /Ton.

Extending the timeline, since 2020, the price of rare earths has been on an upward trend. The price of neodymium praseodymium has risen from about 350,000 yuan/ton in January 2020 to a maximum of about 750,000 yuan/ton in March this year. The price has doubled.

And this is just the beginning. The technological attributes + resource attributes of rare earths make the growth space of this industry close to limitless.

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