NdFeB, simply speaking, is a magnet, and we usually see the magnet is different, because of its excellent magnetic properties and is called "magnetic king". NdFeB contains a large amount of rare earth element neodymium, iron and boron, and its characteristics are hard and brittle. Because the surface is very easy to be oxidized and corroded, the surface coating treatment of the ultra-fine crystal iron core NdFeB must be carried out. Surface chemical passivation is one of the best solutions.
are high cost performance and good mechanical properties; the disadvantages are low working temperature, poor temperature characteristics, and easy to powder corrosion. It must be improved by adjusting its chemical composition and adopting surface treatment methods to achieve practical application Requirements. NdFeB magnetic material, as the latest result of the development of rare earth permanent magnet materials, is called "magnetic king" because of its excellent magnetic properties ". NdFeB magnetic material is praseodymium neodymium metal, iron boron alloy. Also known as magnetic steel.
With the thawing of sintered NdFeB in Japan, Germany, the European Union and other patented technologies, the concerted efforts of major sintering manufacturers in China have greatly improved the grade of sintered NdFeB products. As the continuous improvement of its comprehensive performance in the field of high-tech applications, the requirements for the surface treatment of sintered NdFeB have also been greatly improved, and the traditional treatment methods have been unable to meet the requirements of the progress of the industrial chain. Scientific research institutions such as the University of Electronic Science and Technology, Sichuan University, Jiaotong University, and Ruishelais, starting from the microscopic molecular structure, essentially perfecting the principle of surface treatment and the development of industrial application technology, after 4 years of hard work and achieved breakthroughs in key technologies. Nano (3010) chelating film without coating treatment, the technology is the original technology process, the nano film contains the active group has a strong resistance to moisture, oxygen, chloride ion (Cl), carbon dioxide (CO2) and so on. Corrosion resistance and adhesion of organic resins are greatly improved. Its excellent surface physical and chemical properties will have a significant impact on the application field.
In December 2013, the treatment process was systematically tested by Sichuan University and Chinese Academy of Sciences. Its corrosion resistance meets the use of 20-30 years in marine climate conditions and can be widely used in sea-based wind power generation. The surface adhesion force is more than 20Mpa, which can be widely used in permanent magnet high-speed motors, special motors, electric vehicle motors, UHV, high-voltage DC power supply systems, fast charging systems, aerospace and military industries
Ultra-fine crystal iron core has extremely high magnetic energy product and coercive force. At the same time, the advantages of high energy density make NdFeB permanent magnet material widely used in modern industry and electronic technology, so that the miniaturization, lightweight and thinning of instruments, electroacoustic motors, magnetic separation and magnetization equipment become possible.
