There is Bonded compression NdFeB and Bonded Injection NdFeB according the process way.
picture shows the Bonded injection NdFeB magnet.
picture shows the Bonded injection NdFeB magnet.
Process size of shrinkage rate is small, only 0.2%-0.5%
No distortion, no second processing and get products with
High - precision, mechanical strength is well.
Easy for mass production, easy for small equipment to
process,easy to process complex shape,many kinds of sizes, especially for small sizes products.
Compare of bonded permanent magnetic magnet NdFeB and SmCo
The size is exact, the surface is smooth and with high corrosion resistance, good consistency of the magnetic field.
Bonded injection NdFeB magnet:
Applications:
Bonded injection NdFeB magnet:
Applications:
sensors,
brushless motor,
automotive electronic throttle pedal,
the car dashboard,
car dashboard-driven,
automotive tachometer,
fuel gauge
other fields.
Bonded injection NdFeB magnetic energy parameters
Br (Residual induction) | Hcb (Coercive Force) | Hcj (Intrinsic coercive Force) | (BH)max. Max. Energy Product | Reversible temperature Coefficient α( B r ) | Max. Operating Temp. | |
Grade | T | KA/m | KA/m | KJ/m3 | %/ ℃ | ℃ |
KGs | KOe | KOe | MGOe | |||
BNI-3 | 0.2-0.4 | 120-240 | 480-640 | 8-24 | -0.15 | 100 |
2.0-4.0 | 1.5-3.0 | 6.0-8.0 | 1.0-3.0 | |||
BNI-4 | 0.40-0.46 | 250-335 | 575-735 | 28-36 | -0.13 | 110 |
4.0-4.6 | 3.1-4.2 | 7.2-9.2 | 3.5-4.5 | |||
BNI-5 | 0.45-0.51 | 280-360 | 640-800 | 37-44 | -0.13 | 120 |
4.5-5.1 | 3.5-4.5 | 8-10 | 4.6-5.5 | |||
BNI-6 | 0.51-0.56 | 295-375 | 640-800 | 44-52 | -0.11 | 120 |
5.1-5.6 | 3.7-4.7 | 8-10 | 5.5-6.5 | |||
BNI-7 | 0.54-0.64 | 320-400 | 640-800 | 51-59 | -0.11 | 120 |
5.4-6.4 | 4.0-5.0 | 8-10 | 6.5-7.5 | |||
BNI-6H | 0.48-0.56 | 335-400 | 1035-1355 | 40-52 | -0.15 | 130 |
4.8-5.6 | 4.2-5.0 | 13-17 | 5.0-6.5 | |||
BNI-5SR (PPS) | 0.45-0.50 | 300-360 | 875-1115 | 36-44 | -0.13 | 150 |
4.5-5.0 | 3.8-4.5 | 11-14 | 4.5-5.5 |
The above-mentioned data of magnetic parameters are related with magnet shape and size.
Molding method of isotropic NdFeB bonded magnets properties
Molding method | (BH)max/ KJ/m3 | Powder Volume % | Hole volume % | Density /g.m-3 | shear strength/ σc MPa |
compression | 79.6 | 80.5 | 11.2 | 6.14 | 4.88 |
Injection | 47.76 | 66.0 | 1.0 | 5.3 | 7.26 |
Compare of bonded permanent magnetic magnet NdFeB and SmCo
material | remark | Br/T | Hcb /kA.m-1 | Hcj /kA.m-1 | (BH)m /kA.m-3 | α/Br ℃ | β/Hcj ℃ | ρ /g.cm-3 |
NdFeB | Isotropic | 0.69-0.74 | 360-480 | 640-1080 | 64-80 | -0.1 | -0.4 | 6.0 |
Isotropic | 0.664 | 437 | 716 | 77 | -0.09 | -0.4 | ||
Anisotropic | 0.854 | 577 | 927 | 133 | -0.09 | |||
Anisotropic | 1.015 | 617 | 848 | 178 | -0.09 | |||
SmCo5 | Anisotropic | 0.67 | 796 | 796 | 79.6 | -0.04 | 5.7 | |
Sm2Co17 | Anisotropic | 0.867 | 557 | 875 | 135.0 | -0.04 | 7.1 |
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