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NdFeb Magnets Excellent Magnetic Properties
Aug 08, 2017

NdFeb Magnets Excellent magnetic properties

The antimatter of neodymium-iron-boron permanent magnetic materials, the existence of antimatter in the universe is a major scientific proposition. According to the current big bang theory, the universe is formed by a big bang of about 15 billion years ago. The big bang should produce the same amount of material And the antimatter, the composition of the world around us is the material, and where is the antimatter?

Another problem with astrophysics and cosmology today is to explore dark matter. Astronomy in the universe with optical methods can not see the material called dark matter, which is characterized by neither light nor light, only the existence of gravitation. Recently, astronomical observations and studies have found that dark matter accounts for about 60% of the universe. What are these dark matter? Different opinions.

Therefore, it is particularly important to find a way to detect antimatter and dark matter! As a result, "Alpha magnetic spectrometer" came into being. "Alpha Magnetic Spectrometer" experiment by the Chinese American scientists, Nobel Prize winner Professor Ding Zhaizhong led by the United States, China, Germany, more than 10 countries and regions, many scientists participated in the research and design work. Its core component is a diameter of 1.6 meters, 1.2 meters in diameter, weighing 2 tons of NdFeB ring permanent magnets, if the use of conventional magnets, due to the impact of the magnetic field and can not run in space, and the use of superconducting magnets And must be run at ultra-low temperature, nor realistic, what material the most appropriate? China's scientists have produced a fully meet the requirements of the space running NdFeB permanent magnet, into the "Alpha magnetic spectrometer" for its capture of antimatter and dark matter information to provide a strong magnetic force.

Characteristics and Processing Technology of NdFeB Magnet

NdFeB magnetic materials, as the latest results of the development of rare earth permanent magnet materials, because of its excellent magnetic properties known as the "magnetic king." NdFeB magnetic material is neodymium, iron oxide and other alloys. Also known as magnet steel. NdFeB has a very high energy product and power, while the advantages of high energy density NdFeB permanent magnet materials in modern industrial and electronic technology has been widely used, so that instrumentation, electro-acoustic motor, magnetic magnetization It is possible to miniaturize, reduce, and reduce the size of the apparatus. NdFeB has the advantages of high cost performance and good mechanical properties. The disadvantage is that the Curie temperature is low, the temperature characteristics are poor, and it is easy to be pulverized and corroded. It must be improved by adjusting its chemical composition and adopting the surface treatment method , In order to achieve the practical application requirements.

The third generation of rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets, its main raw material is rare earth metal neodymium 29% -32.5% metal element iron 63.95-68.65% non-metallic element boron 1.1-1.2% Dysprosium 0.6-1.2% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements.

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