Bonded Magnets
Bonded Magnets
Bonded magnets are a unique class of magnetic materials formed by blending magnetic powder with a binding agent. This blend is precision-molded under controlled pressure and subsequently cured at temperatures ranging from 150 to 175°C. The resulting magnet’s shape and dimensions are determined by the mold, enabling one-step production without the need for secondary machining. These magnets boast several key advantages, including exceptional magnetic performance, precise dimensional consistency, versatility in shaping, excellent resistance to corrosion, multiple magnetization options, and suitability for large-scale production, ensuring elevated manufacturing efficiency.
Magnetic Properties
Grade | Br | Hcb | Hcj | (BH)max | αBr | Tc | Tw | Density | Hardness | ||||
mT | kGs | kA/m | kOe | kA/m | kOe | kJ/m3 | MGOe | %/°C | °C | °C | g/cm3 | HRB | |
CMN-2 | 300-400 | 3.0-4.0 | 160-240 | 2.0-3.0 | 480-640 | 6.0-8.0 | 16-24 | 2.0-3.0 | -0.11 | 350 | ≤160 | 4.5-5.0 | 40-45 |
CMN-4 | 400-500 | 4.0-5.0 | 240-320 | 3.0-4.0 | 560-720 | 7.0-9.0 | 32-44 | 4.0-5.5 | -0.11 | 350 | ≤160 | 5.2-5.7 | 40-45 |
CMN-6 | 500-600 | 5.0-6.0 | 320-400 | 4.0-5.0 | 560-720 | 7.0-9.0 | 48-60 | 6.0-7.5 | -0.11 | 350 | ≤160 | 5.5-6.0 | 40-45 |
CMN-8 | 600-680 | 6.0-6.8 | 360-440 | 4.5-5.5 | 640-800 | 8.0-10.0 | 60-72 | 7.5-9.0 | -0.11 | 350 | ≤160 | 5.8-6.1 | 35-38 |
CMN-8H | 600-650 | 6.0-6.5 | 400-480 | 5.0-6.0 | 1040-1360 | 13.0-17.0 | 60-68 | 7.5-8.5 | -0.12 | 300 | ≤160 | 5.8-6.1 | 35-38 |
CMN-8SR | 600-650 | 6.0-6.5 | 400-480 | 5.0-6.0 | 800-1120 | 10.0-14.0 | 60-68 | 7.5-8.5 | -0.13 | 300 | ≤180 | 5.8-6.1 | 35-38 |
CMN-8L | 600-800 | 6.0-6.8 | 400-480 | 5.0-6.0 | 640-800 | 8.0-10.0 | 64-72 | 8.0-9.0 | -0.12 | 300 | ≤160 | 5.8-6.1 | 35-38 |
CMN-10 | 680-730 | 6.8-7.3 | 400-480 | 5.0-6.0 | 640-800 | 8.0-10.0 | 76-84 | 9.5-10.5 | -0.1 | 350 | ≤160 | 5.8-6.1 | 35-38 |
CMN-10H | 700-750 | 7.0-7.5 | 400-480 | 5.0-6.0 | 640-800 | 8.0-10.0 | 80-88 | 10.0-11.0 | -0.1 | 350 | ≤160 | 6.0-6.3 | 35-38 |
CMN-12 | 720-770 | 7.2-7.7 | 440-520 | 5.5-6.5 | 720-880 | 9.0-11.0 | 88-96 | 11.0-12.0 | -0.1 | 350 | ≤160 | 6.0-6.3 | 35-38 |
CMN-12D | 720-770 | 7.2-7.7 | 440-520 | 5.5-6.5 | 720-880 | 9.0-11.0 | 88-96 | 11.0-12.0 | -0.08 | 400 | ≤170 | 6.0-6.3 | 35-38 |
CMN-12L | 760-810 | 7.6-8.1 | 400-480 | 5.0-6.0 | 480-640 | 6.0-8.0 | 88-96 | 11.0-12.0 | -0.11 | 320 | ≤150 | 6.0-6.3 | 35-38 |
CMN-13L | 780-830 | 7.8-8.3 | 400-480 | 5.0-6.0 | 480-640 | 6.0-8.0 | 88-104 | 11.0-13.0 | -0.11 | 320 | ≤150 | 6.1-6.4 | 35-38 |
Notes: CMN-*(H/D or L)
CMN: Indicates that mould pressing, magnetic powder material is MQ patent product.
*: Indicates that (BH)max typical values is *MGOe.
H/D: Indicates that intrinsic coercive force is high.
L: Indicates that intrinsic coercive force is low.
Result Of Soak Test 25°C X 100 Hours
Solvent | Size | Weight | Flux Loss | Appearance |
D.I.Water | ±0.5% | ±0.5% | ±0.5% | No Rusting |
Water | ±0.5% | ±0.5% | ±0.5% | No Rusting |
NaCI | ±0.5% | ±0.5% | ±0.5% | Slight Rusting |
0.4% NaOH | ±0.5% | ±0.5% | ±0.5% | No Rusting |
6% HNO3 | ±0.5%~2.5% | ±0.5% | ±0.5%~2.5% | Slight Rusting |
Epoxy | ±0.5% | ±0.5% | ±0.5% | No Rusting |
H2S | ±0.5% | ±0.5% | ±0.5% | No Rusting |
Acetone | ±0.5% | ±0.5% | ±0.5% | No Rusting |
Machine Oil 30# | ±0.5% | ±0.5% | ±0.5% | No Rusting |
Gasoline | ±0.5% | ±0.5% | ±0.5% | No Rusting |
Application
The primary domain of application for bonded magnets lies within miniature electric motors, encompassing a diverse array of motor types such as spindle motors, stepper motors, synchronous motors, DC motors, and brushless DC motors. Notably, they can effectively serve as partial substitutes for sintered NdFeB and ferrite magnets, streamlining motor assembly processes, enhancing reliability, reducing overall production costs, and optimizing efficiency across a spectrum of applications.
