Bonded NdFeB magnets, i.e. bonded neodymium iron boron magnets, are those permanent magnetic materials made of rapid quenched NdFeB magnetic powders combined with resin binders (epoxy, Nylon/polyamide (PA), polyphenylene sulfide (PPS), etc). They are manufactured through a bonded process (compression, injection, extrusion or calendaring molding), so it is available to obtain complex geometries with high dimensional precision. Controlling the performance and proportion of NdFeB magnetic powders, it is able to adjust the magnets’ magnetic properties in a continuous range. Due to their complex geometries availability, high dimensional precision, uniform magnetic properties, diverse magnetization patterns, good corrosion resistance and mechanic properties, bonded NdFeB magnets are widely applied in spindle motors, micro motors, direct current (DC) motors, synchronous motors, power tools, magnetic rollers, Hall effect sensors, etc.
| Grade | Br | Hcb | Hcj | (BH)max | Tw | ||||
| kGs | T | kOe | kA/m | kOe | kA/m | MGOe | kJ/m3 | °C | |
| HGT-12 | 7.0-7.6 | 0.70-0.76 | 5.5-6.5 | 438-517 | 8-11 | 637-875 | 10.0-11.0 | 80-88 | ≤160 |
| HGT-11 | 6.7-7.3 | 0.67-0.73 | 5.3-6.0 | 422-478 | 8-11 | 637-875 | 9.8-10.5 | 78-84 | ≤160 |
| HGT-10H | 6.2-6.8 | 0.62-0.68 | 5.4-6.0 | 430-478 | 11-14 | 875-1115 | 8.8-9.5 | 70-76 | ≤180 |
| HGT-10 | 6.5-7.1 | 0.65-0.71 | 5.2-6.0 | 414-478 | 8-10 | 637-796 | 9.0-9.7 | 72-77 | ≤160 |
| HGT-9 | 6.3-6.9 | 0.63-0.69 | 5.0-5.8 | 398-462 | 8-10 | 637-796 | 8.6-9.3 | 68-74 | ≤160 |
| HGT-8H | 6.0-6.6 | 0.60-0.66 | 4.8-5.8 | 382-462 | 10-13 | 796-1035 | 7.5-8.5 | 60-68 | ≤180 |
| HGT-8 | 6.2-6.8 | 0.62-0.68 | 5.0-5.8 | 398-462 | 8-10 | 637-796 | 7.8-8.8 | 62-70 | ≤160 |
| HGT-7 | 5.8-6.5 | 0.58-0.65 | 4.4-5.2 | 350-414 | 6-9 | 478-716 | 7.0-8.0 | 56-64 | ≤160 |
| HGT-6 | 5.3-6.0 | 0.53-0.60 | 3.7-4.6 | 295-366 | 6-9 | 478-716 | 5.9-6.8 | 47-54 | ≤160 |
| HGT-5 | 4.8-5.5 | 0.48-0.55 | 3.2-4.0 | 255-318 | 5-8 | 398-637 | 4.8-5.5 | 38-44 | ≤160 |
| HGT-4 | 4.2-5.0 | 0.42-0.50 | 2.8-3.6 | 223-287 | 5-8 | 398-637 | 3.5-4.5 | 28-36 | ≤160 |
| HGT-3 | 3.5-4.3 | 0.35-0.43 | 2.4-3.3 | 191-263 | 5-8 | 398-637 | 2.6-3.6 | 21-29 | ≤160 |
| HGT-2 | 3.0-3.8 | 0.30-0.38 | 2.0-3.2 | 159-255 | 5-8 | 398-637 | 1.9-3.0 | 15-24 | ≤160 |
Note:
∗ The data in the above table were samples’ results tested at the temperature of 20 °C.
∗ The temperature coefficients of Br and Hcj are α(Br): -0.10~-0.12 %/ºC and β(Hcj): -0.40~-0.60 %/ºC, respectively.
∗ The above data are only for reference, magnets can be tailored according to customers’ personalized requirements.
Bonded NdFeB Magnets
Note:
∗ Other shapes of bonded NdFeB magnets can also be tailored according to customers' specific requirements.
| Parameter | Unit | Value |
|---|---|---|
| Density (ρ) | g/cm3 | 4.5-6.5 |
| Curie Temperature (Tc) | ºC | 300-350 |
| Recoil Permeability (μrec) | - | 1.20 |
| Rockwell Hardness (HR) | MPa | 35-45 |
| Compressive Strenght (σbc) | MPa | 800-1000 |
| Tensile Strength (σb) | MPa | 200 |
| Thermal Expansivity (α) | 10-6/ºC | 1-2 |
Note:
∗ The above data are only for reference, specific magnets maybe have different values.
