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What is NdFeB?

What is NdFeB?

NdFeB is the third-generation rare earth permanent magnet material, which is called “Magnetic King” because of its excellent properties. High-performance NdFeB is mainly used in motors, compressors, sensors, etc. in the field of high technical barriers.

1. Material introduction

NdFeB is a tetragonal crystal composed of neodymium, iron and boron (Nd2Fe14B), of which neodymium accounts for 25%~35%, iron accounts for 65%~75%, and boron accounts for about 1%.

It is the third-generation rare earth permanent magnet material, which has excellent performance in “magnetic properties” coefficients such as intrinsic coercivity, magnetic energy product and remanence, and is a well-deserved “magnet king”.

According to different production processes, NdFeB permanent magnets can be divided into three types: sintering, bonding and hot pressing, while high-performance NdFeB refers to the intrinsic coercivity (Hcj, kOe) and the maximum magnetic energy product ((BH) Sintered NdFeB permanent magnet materials with the sum of max, MGOe) greater than 60 are widely used in many high-precision fields.

2. Processing technology

NdFeB cutting is a very important process. Many manufacturers use an inner diameter cutting machine to cut NdFeB, but there is a NdFeB cutting machine on the market that uses a diamond wire loop as cutting tool. The cutting efficiency is 3 times that of the inner diameter cutting machine. For details, please see Psalms below:

3. Application field

New energy vehicles, inverter air conditioners, energy-saving elevators, maglev trains, intelligent robots, wind power…

4. Development path

5. Industry development goals

As one of the key strategic materials in rare earth functional materials, high-performance NdFeB permanent magnet materials are used in high-performance NdFeB permanent magnets in new energy vehicles, high-speed rail, robots, consumer electronics and other fields. The specific performance requirements are:

1. Low heavy rare earth NdFeB series: 52SH grade products, comprehensive heavy rare earth content < 1wt%;
2.48UH grade products, comprehensive heavy rare earth content < 1.5wt%;
3.44EH grade products, comprehensive heavy rare earth content < 2.5wt%;
4. High-performance radiation ring: comprehensive magnetic properties (BHm) (MGOe) + Hcj (kOe) > 60;
5. High-performance anisotropic bonded magnets: (BHm)(MGOe)+Hcj(kOe)>30.

6. Market Development Trend

At present, in the downstream application market of high-performance NdFeB, wind power occupies a large proportion of the market share. With the rapid development of new energy vehicles, the application of NdFeB in automotive micro and special motors has been continuously promoted, and the demand for high-performance NdFeB in the field of new energy vehicles and auto parts will increase explosively.

 


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