Nd-Fe-B Bonded – Neodymium Plastic Magnet
Characteristics of magnets
As formed, these magnets achieve high dimensional accuracy and complex shaping.
These magnets are made by combining plastic with metal powder having a combination (Nd-Fe-B) similar to that of sintered neodymium magnets and then forming the mixture. Since the magnets contain plastics, the magnetism is much lower. As formed, however, these magnets offer the advantage of being processed into thin products with high dimensional precision and products of complex shaping. Moreover, isotropic magnets are easily magnetized radially and can be magnetized in many varieties as well. Their temperature characteristics are a little lower than those of neodymium magnets, and are unsuited for use at 80°C or higher.
Nd-Fe-B Bonded – Neodymium Plastic Magnet
Characteristic data
| Material name | Residual flux density (Br) kG/T |
Magnetic coercive force | (BH) max MGOe/kJ/m3 |
|
| (Hcb) kOe/kA/m |
(Hcj) kOe/kA/m |
|||
| Residual Induction | Coercive Force | Max.Energy Product | ||
| GPM-8 | 6.0 – 6.5 0.60 – 0.65 |
4.5 – 5.5 360 – 440 |
8.0 – 10.0 640 – 800 |
7.5 – 8.5 60 – 68 |
| GPM-8L | 6.2 – 6.8 0.62 – 0.68 |
5.0 – 6.0 400 – 480 |
8.0 – 10.0 640 – 800 |
8.0 – 9.0 64 – 72 |
| GPM-10 | 6.8 – 7.1 0.68 – 0.71 |
5.0 – 6.0 400 – 480 |
8.0 – 10.0 640 – 800 |
9.5 – 10.5 76 – 84 |
| GPM-10H | 7.0 – 7.2 0.70 – 0.72 |
5.0 – 6.0 400 – 480 |
9 – 11 720 – 880 |
10 – 11 80 – 88 |
| GPM-12 | 7.2 – 7.7 0.72 – 0.77 |
5.5 – 6.5 440 – 520 |
9.0 – 11.0 720 – 880 |
11 – 12 88 – 96 |
| GPM-12D | 7.2 – 7.7 0.72 – 0.77 |
5.5 – 6.5 440 – 520 |
10.0 – 12.0 800 – 960 |
11 – 12 88 – 96 |
| GPM-13L | 7.5 – 8.3 0.75 – 0.83 |
5.0 – 6.0 400 – 480 |
7.0 – 8.0 540 – 640 |
12 – 13 96 – 104 |
Demagnetization curve
Demagnetization curve OF Bonded Neodymium Plastic Magnet
Physical characteristics of magnet
| Temp. coefficient | Density | Curie Temp. | Vickers hardness | Working Temp. | |
| (20°C – Tw) | (D) | (Tc) | (HV) | Tw | |
| Product name | αBr -%/°C |
g/cm3 | °C | °C | |
| GPM-8 | 0.11 | 6.0 | 350 | 78 – 80 | 160 |
| GPM-8L | 0.12 | 6.0 | 300 | 78 – 80 | 160 |
| GPM-10 | 0.10 | 6.0 | 350 | 78 – 80 | 160 |
| GPM-10H | 0.10 | 6.2 | 350 | 78 – 80 | 160 |
| GPM-12 | 0.10 | 6.3 | 350 | 78 – 80 | 160 |
| GPM-12D | 0.08 | 6.3 | 400 | 78 – 80 | 170 |
| GPM-13L | 0.11 | 6.3 | 320 | 78 – 80 | 150 |
Manufacturing process
Manufacturing process OF Bonded Neodymium Plastic Magnet
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