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Neodymium iron boron is a kind of ndfeb magnet. It is different from other magnets because of its excellent magnetic properties.
Neodymium iron boron contains a large amount of rare earth element neodymium, as well as iron and boron. It is hard and brittle.
Because surface of ndfeb magnet is very easy to be oxidized corrosion, ndFeb magnet must be surface coated.
Surface chemical passivation of ndfeb magnet is one of the best solutions.
As rare earth ndfeb permanent magnet material of magnetic energy product and high coercive force, ndfeb magnet has high energy density at the same time the advantages of ndfeb permanent magnet material in modern industry brings the wide application of ndfeb magnet for electronic technology, exemplified by magnetic instruments and meters, electronic motor, magnetization of the magnetic separation equipment miniaturization, lightweight.
Ndfeb magnet has the advantage of high cost performance and good mechanical properties.
The disadvantage of ndfeb magnet is that the working temperature is low, the temperature characteristic is poor, and it is easy to be powdered. It must be improved by adjusting its chemical composition and adopting surface treatment method, so as to meet the requirements of practical application.
NdFeb magnetic material is the latest development of rare earth permanent magnetic material. It is called "magnetic king" because of its excellent magnetic properties.
Neodymium iron boron magnetic material is praseodymium metal, boron iron alloy, also known as magnetic steel.
There are two kinds of ndFeb magnets: sintered NdFeb and bonded NdFEB. Bonded NdFEB are magnetic in all directions and corrosion-resistant.
Sintered NdFeb is easy to corrode and the surface of such magnet product needs to be coated with zinc, nickel, environmental zinc, environmental nickel, nickel copper nickel, environmental nickel copper nickel and so on. And sintered NdFeb general axial and radial magnetization, according to the need to determine the working face.
With development of sintered ndfeb respectively in Japan, Germany, European Union in the patent technologies such as the thawing, together with our country sintering magnt factory of collaborative efforts, sintered ndfeb improve product grade. As a high-tech applications for its comprehensive performance of the constantly improve, the requirements for surface treatment of sintered ndfeb also greatly increased, the traditional processing method has been unable to meet the requirements of industrial progress. Electronic science and technology university, sichuan, jiaotong university, and other scientific research institutions, from the microscopic molecular structure, essentially perfect surface treatment principle and industrial application technology development, after four years of hard work and key technology.
Breakthrough. Nanometer (3010) chelate thin film coating processing, the technology is original technology, nano membrane layer contains the active group has a strong resistance to moisture and oxygen, chloride (Cl), carbon dioxide (co2), etc. Corrosion resistance and organic resin bonding ability greatly increased performance for ndFeb magnet prdoduct . Its excellent surface physical and chemical properties will have a significant impact on ndFeb magnet prdoduct applications.
In December 2013, the process of ndFeb magnet was done by Chinese Academy of Sciences system test. Such ndFeb magnet prdoduct, with its corrosion resistance of use 20 to 30 years in the Marine climate condition, can be widely used in wind power heikki. Surface bond strength more than 20 mpa, can be widely used in high-speed permanent magnet motor, special motor, electric car motor, ultra-high voltage, high voltage dc power supply system, a quick charging system, aerospace defense industry and other fields
Sintered NdFeb permanent magnet material
With excellent magnetic properties, NdFeb permanent magnet is widely used in electronics, power machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. More common are permanent magnet motor, magnetic speaker, magnetic separator, magnetic computer disk drive, magnetic resonance imaging equipment and magnetic instruments.
Nano (Royce3010) chelate thin film coating processing can use 20 to 30 years in the Marine climate condition, widely used in wind power heikki. Surface bond strength more than 20 mpa, can be used widely in high-speed permanent magnet motor, special motor, electric car motor, ultra-high voltage, high voltage dc power supply system, quick charging system, aerospace defense industry and other fields.
NdFeb permanent magnet is based on the intermetallic compound Re2Fe14B.
The main components are neodymium (Nd), iron (Fe) and boron (B).
Rare earth elements mainly for neodymium (Nd), in order to obtain different performance available parts of dysprosium (Dy), praseodymium (Pr), and other rare earth metals, iron can also be cobalt (Co), aluminum (Al) and other metal parts replacement, boron content is smaller, but to form a square crystal structure between the metal compounds play an important role, makeing compounds with high saturation magnetization, high uniaxial anisotropy and high Curie temperature.
The third generation of rare earth permanent magnet Neodymium iron boron is the most powerful permanent magnet among contemporary magnets. And such strong magnet product could be manufactured by 2020 best magnet product manufacturer, Zhongke magnet factory with 35+ years in experience, Its main raw materials include the metallic element iron 63.95-68.65%, the metallic element iron 63.95-1.2%, the non-metallic element boron 1.1-1.2%, the dysprosium 0.6-8%, niobium 0.3-0.5%, aluminum 0.3-0.5%, copper 0.05-0.15% and other elements.
How to differ ndfeb magnet from other magnet products?
1. Usually place a magnet of the same specification on a plane that can be absorbed, such as patch, blade, iron gate, etc., and use handle to identify the size of magnetic force
2. Use electronic balance: the weak magnetic force and its density is generally related, the density is small magnetic force is relatively small, the weight that is heavy magnetic force is relatively large, on the contrary, the light weight magnetic force is small if the requirements of magnet is high you need to test ndfeb magnet instrument.
Ndfeb magnet is composed of sintered ndfeb permanent magnet materials and magnetic properties of 2 kinds of three parts, the first part is given priority to, according to the chemical symbol ND of neodymium, iron chemical symbol of FE and boron element, chemical symbol B, the second part is the line in front of the Numbers, this is the material nominal value of the maximum magnetic energy product (BH) Max (in kj/m3), the third part is to slash the number, the intensity of magnetic polarization coercive force value (unit for KA/m), one over ten of numerical adopts the nearest integer.
NdFeB magnet is a tetracrystal formed by nd, Fe, b (Nd2Fe14B).
Neodymium magnets were discovered in 1982 by Masato Sagawa of Sumitomo Special Metals in Japan.
The BHmax of this magnet was greater than the BHmax of a samarium cobalt magnet, the largest mass in the world at that time.
Later, Sumitomo special metals developed successfully powder metallurgy process.
General motors developed the melt-spinning process, which was to produce NdFeb magnets.
This ndfeb magnet is the most powerful permanent magnet and the most commonly used rare earth magnet currently, more info about ndfeb magnet, click on " neodymium magnet encyclopedia" and get details.
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