Polymer Bonded NdFeb Magnet

Epoxy Coating Finish
Nickel Plating Finish

Mixed by magnetic powders and adhesives, bonded permanent magnets are produced through the process of forming and solidification. Anisotropic bonded magnets with stronger magnetic property can be developed. Our bonded products of NdFeB is mixing NdFeB powder with polymer binder and then pressing. In our company, press forming is adopted to manufacture all kinds of bonded magnets. With the advantages of outstanding mechanical strength and high accuracy in dimension, this kind of magnets is resistant to shock and usually further machining is not required. If necessary, the Compress Bonded NdFeB can be formed integrally with other components as well. So that lot production is easy to be implemented. Compress Bonded NdFeB have exactitude size, stable capability, excellent quality, and various specifications, and are widely used. They are world-widely sold and well appraised. Much higher corrosion resistance in comparison with sintered NdFeB magnets. We can supply such types as ring, tile/segment, slim rod and other special shapes and wide variety of size ranges.

Some of the Advantages of Polymer Bonded NdFeB Magnets

In our company, press forming is adopted to manufacture all kinds of bonded magnets. We can supply such types as ring, tile, slim rod and other special shapes.

Characteristics of Polymer Bonded NdFeB:

Application of Polymer Bonded NdFeB:

Bonded magnets are widely used in all kinds of DC brushless motor of automotive, stepping motor, lighter, sensor; HDD(PC disk), stator or rotor of spindle driver of harddisk, CD-ROM, DVD; Printer, electronic clock, audio and electric tools; Mobile phone and BP vibration motor, micro-special motors, automobile's electric motors, auto-controlling devices, transducers, drives, electronic communication devices, instruments and appliances.

Professional Cordless Powder Tools Offer Opportunities for Expanded use of Bonded Neo.

Issues Limiting Expanded Use:

  1. Cost of Material ($/MGOe)
  2. Thermal Demagnetization
  3. Ease of Magnetization
  4. Corrosion Resistance
Magnetic properties of Polymer bonded NdFeB Magnets
P/N Br
Intrinsic Coercivity
Coercive Force
Maximum Energy Product
MT kG kA/m kOe kA/m kOe KJ/m3 MGOe
NdFeB-NB6 440-560 4.40-5.60 560-680 7.0-8.5 240-320 3.0-4.0 32-48 4.0-6.0
NdFeB-NB8 540-640 5.40-6.40 640-720 8.0-9.0 320-400 4.0-5.0 48-64 6.0-8.0
NdFeB-NB8M 540-620 5.40-6.20 1040-1360 13.0-17.0 384-464 4.8-5.8 56-72 7.0-9.0
NdFeB-NB10 620-700 6.20-7.00 608-800 7.6-10.0 360-456 4.5-5.7 64-80 8.0-10.0
NdFeB-NB12 690-760 6.90-7.60 640-840 8.0-10.5 400-480 5.0-6.0 80-96 10.0-12.0
Physical Chracteristics of bonded NdFeB Magnets
P/N μrec
Recoil Permeability
Magnetizing Field
Temperature Coefficient Tc
Curie Temperature
Ring Crushing Strength
Coefficient of Thermal Expansion (25-200℃)
μrec kA/m g/cm3 kOe α(Br)%/℃ β(Hcj)%/℃ kg/mm2 10-6/℃
NdFeB-NB6 1.22 √1600 5.1-5.6 √20 -0.14 -0.40 360 √5.5 4.8
NdFeB-NB8 1.22 √1600 5.4-5.8 √20 -0.13 -0.40 360 √5.5 4.8
NdFeB-NB8M 1.18 √2000 5.8-6.0 √25 -0.12 -0.38 305 √5.5 4.8
NdFeB-NB10 1.22 √1600 5.8-6.0 √20 -0.11 -0.40 360 √5.5 4.8
NdFeB-NB12 1.17 √1600 5.9-6.1 √20 -0.11 -0.41 360 √5.5 4.8