Neodymium iron boron magnets are currently commonly used high magnetic magnets. It depends on the crystal structure. The specific words are complicated.

Introduction: The third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet among contemporary magnets. Its BHmax value is 5-12 times that of ferrite magnets and 3-10 times that of alnico magnets; its coercivity is equivalent to 5-10 times that of ferrite magnets and 5- 15 times, its potential magnetic performance is extremely high, and it can suck up heavy objects 640 times its own weight.

The mechanical properties of neodymium iron boron magnets are better than samarium cobalt magnets and alnico magnets, and it is easier to cut, drill and process complex shapes.

The disadvantage of neodymium iron boron magnets is its poor temperature performance, large magnetic loss when used at high temperatures, and low maximum operating temperature. Generally, it is about 80 degrees Celsius, and the maximum working temperature of magnets with special treatment can reach 200 degrees Celsius.

NdFeB magnets are currently widely used in aerospace, electronics, electromechanical, instrumentation, medical and other fields. And the use of non-technical fields is becoming more and more extensive, such as adsorption magnets, toys, jewelry and so on.

Unfortunately, in order to protect and rationally use our country’s superior resources, according to the provisions of the protective mining of specific minerals to implement planned mining, in accordance with the relevant requirements of the "Notice of the Ministry of Land and Resources on Issuing and Implementing the National Mineral Resources Planning", the comprehensive research resources Factors such as reserves, existing prospecting rights, mining rights settings, and international and domestic market demand trends, the state has implemented total mining control management for tungsten and rare earth mines, and total mining control management for antimony mines. Currently, the acceptance of applications for exploration licenses and mining licenses for tungsten, antimony and rare earth minerals has been suspended.

At the same time, the price of rare earth resources for making magnets is rising, and many places in the country are reducing the exploitation of rare earths! Now the output is decreasing and the demand is increasing. In addition, resources are especially scarce during the current epidemic, so the price of magnets is rising more and more.