advantages

Grain boundary diffusion technology Can reduce the use volume of the rare earth (dysprosium /terbium) so that it can save the heavy rare earth resource effectively, and decreases the production cost of the magnet as well as enhance the comprehensive cost performance of high grade neodymium magnet.

Aiming at the magnets with same grade, compared with traditional technology, GBD technology uses less (HREE) Heavy rare earth and this technology can make the magnet with higher comprehensive cost performance, like 52SH, 52UH, 45EH, 42AH, 38TH, part of them Hcj(kOe)+(BH)max(MGOe)>82.

Lamination Neodymium magnet is proved that it can reduce the eddy current loss for the high-efficiency motors. The reduction of the eddy current loss can decrease the heat and enhance the efficiency. Nowadays, new-energy Auto, aerospace as well as Intelligent industrial robot markets are addicted to pursuing the balance of motor power and calorific value, so the demand of laminated neodymium magnet has kept increasing. With respect to your designing team and project requirement, we can help you to realize the magnetic customization of the following contents by using the licensed process and our production capacity. We help you achieve the following magnetic customization:

  • Insulation thickness:70μm-100μm
  • Insulation layers:2-40 layers
  • Max working temp. of the magnet:60-350℃
  • Temp. resistance of the magnet surface coating:-60-300℃
  • Corrosion resistance of the magnet surface coating:Neutral salt spray resistance can be over 500hrs and PCT can be over 200hrs.

Nano coating technology is developed based on advanced metal anti-corrosion technology for extreme marine environments, which is an organic/inorganic,crystalline/amorphous,metal/nonmetal multi-compound environmentally friendly anti-corrosion coating material.

Excellent corrosion resistant protective layer is formed on the surface of NdFeB material by spraying and curing, and the bonding ability between the coating and metal surface is significantly enhanced by using nano effect and interface modification strengthening, which has excellent ion shielding ability and anti-corrosion function.

The coating colors can be divided into silver white, silver gray, matte black and glossy black, suitable for replacing surface treatment as NiCuNi, epoxy and spraying Everlube and other anti-corrosion layers, providing an environmentally friendly solution for NdFeB magnet anti-corrosion protection layer. Features of Nano coating:


  • Super strong anti-corrosion performance (wind turbine generator magnet nano-coating verification data: PCT≥380h,CASS≥1000h)
  • Higher mechanical properties (hardness of pencil testing : 5-6H)
  • Excellent Stability
  • High reliability (no effect on magnetic properties)

By optimizing the magnet’s composition, microstructure and surface treatment, our company has developed a series of low- weight- loss magnet , the weight loss of which can be lower than 1-5mg/cm² after the corrosion HAST test(130 ℃,2.7atm,100% humidity 7/14/20/30days), Our low weight loss of magnet reaches the current highest international standard.

Low weight loss

  • Before the experiment

  • After the experiment

Low temperature coefficient Neodymium series can be used in sealed conditions at least 20 years. The Br value α(20~MT) reaches -0.095%/℃. Compared with conventional temperature coefficient magnets, low temperature coefficient magnets have better demagnetization resistance and magnetic flux density consistency For example, 35UHT low temperature coefficient magnet is baked at 180 ℃ for 200hrs, and the magnetic power loss rate is less than 1%. At the same time, the magnet also has low weight loss characteristics. At 130 ℃, 100% RH, 2.7 atm, 168hrs, the weight loss rate is less than 0.5 mg/cm². After passivation of the magnet surface, the magnet can stably serve for more than 20 years in a sealed environment.

Non/low rare earth Dy/Tb tech. Optimizing the formulation and strip cast material’s structure to achieve magnet ‘s grain size refined and microstructure optimized. It reduces the dependence on heavy rare earth dysprosium /terbium, and reduces the cost of materials for higher grade neodymium magnet.

No Heavy Rare Earth (Dysprosium, Terbium) Product Series
  • N54,52M, 48H,50H(Hcj>16)
  • 30SH,33SH,35SH, 38SH,40SH
Low Heavy Rare Earth (Dysprosium, Terbium) Product Series
  • 50H(Hcj>17),52H,42SH and 35UH

Ask the Experts

Want to know more?

We would provide you more about our company and work with you to solve the most demanding magnet performance challenges. In case of any questions, please feel free to get in contact with us via telephone or E-mail.


Tel:0086 (0)21 5266 8918
Email:info@cj-magnet.com

Wechat