Knowledge of sintered NdFeB

25 Jun
NdFeB magnets are tetragonal crystals formed by neodymium, iron, and boron (Nd2Fe14B). NdFeB permanent magnet material is a permanent magnet material based on the intermetallic compound Nd2Fe14B. The main components are the rare earth elements neodymium (Nd), iron (Fe), and boron (B). Among them, the rare earth element is mainly neodymium (Nd). In order to obtain different properties, it can be replaced by other rare metals such as dysprosium (Dy) and praseodymium (Pr), and iron can also be replaced by other rare metals such as cobalt (Co) and aluminum (Al). Partial replacement of metals, the content of boron is small, but it plays an important role in the formation of tetragonal crystal structure intermetallic compounds, making the compounds have high saturation magnetization, high uniaxial anisotropy and high Curie-temperature .
NdFeB magnets (strong magnetic magnets) are currently widely used and rapidly developing magnet products with extremely high magnetic properties. Because NdFeB has high magnetic properties and easy processing, the working temperature can be as high as 200 degrees Celsius, and its texture is hard, stable in performance, and has a good price/performance ratio, so its application is extremely extensive. But because of its strong chemical activity, it must be treated on its surface. Significant improvements have been made in both corrosion resistance and temperature stability with technological innovations in ingredients and processes.

钕铁硼分为烧结ed NdFeB and bonded NdFeB.



NdFeB is divided into two types: sintered NdFeB and bonded NdFeB. Bonded NdFeB has magnetism in all directions and is corrosion-resistant; sintered NdFeB is easy to corrode and needs coating on the surface. Zinc-plated, nickel, environmentally friendly zinc, environmentally friendly nickel, nickel-copper-nickel, environmentally-friendly nickel-copper-nickel, etc. Sintered NdFeB is generally divided into axial magnetization and radial magnetization, which are determined according to the required working surface.
Sintered NdFeB permanent magnets are smelted and smelted by air-milling. They have high coercivity and extremely high magnetic properties. Its own mechanical properties are also quite good, and it can be cut into different shapes and drilled. High performance products. The working temperature can reach 200 degrees Celsius. Because its substance content easily leads to corrosion, the surface must be treated with different coatings according to different requirements (such as galvanized, nickel, environmentally friendly zinc, environmentally friendly nickel, nickel-copper-nickel, environmentally-friendly nickel-copper-nickel, etc.).
Sintered NdFeB permanent magnet material has excellent magnetic properties and is widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. The more common permanent magnet motors, speakers , Magnetic separators, computer disk drives, magnetic resonance imaging equipment and meters, etc.