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How to Choose Permanent Magnet Materials
30/04/2014
Each permanent magnet material discussed above has its own pros and cons. How to choose the right one for your particular application is a challenge to any user. A balance between cost and performance must be considered in selecting of permanent magnet material. In Reference Information section of this page, several reference books are listed. These books may be helpful to you in designing and selecting permanent magnet materials. Following is a Comparison Table to help you select a right permanent magnet material for your applications.
Permanent Magnet Material Comparison Table
Note: The data listed in the table are for reference only
| Material | Cost Index | Maximum Energy Products (BH)max(MGOe) | Coercivity Hci(Koe) | Maximum Working Temperature(°C) | Machinability |
|---|---|---|---|---|---|
| Nd-Fe-B(sintered) | 65% | Up to 45 | Up to 30 | 180 | Fair |
| Nd-Fe-B (bonded) | 50% | Up to 10 | Up to 11 | 150 | Good |
| Sm-Co (sintered) | 100% | Up to 30 | Up to 25 | 350 | Difficult |
| Sm-Co (bonded) | 85% | Up to 12 | Up to 10 | 150 | Fair |
| Alnico | 30% | Up to 10 | Up to 2 | 550 | Difficult |
| Hard Ferrite | 5% | Up to 4 | Up to 3 | 300 | Fair |
| Flexible | 2% | Up to 2 | Up to 3 | 100 | Excellent |
specialized in manufacturing all kinds of rare-earth permanent magnets, According to the customers request, we can produce all kinds of NdFeB magnets with different complicated shapes and get them magnetized with multi-poles. The products are widely used in motor, micromotor, computer, instrument, car, motorcycle, amera, watch, HiFi, electric appliances, office automation, toy, magnetic therapy and other fields of daily life.