In comparison with NdFeB magnets, SmCo magnets work at higher operating temperatures and have better temperature stability. Due to their high magnetic properties they are particularly suitable for applications where the relationship between magnetic properties and the size of the magnet is very important.
Interesting for applications which require low magnetization fields at high temperature stability and coercivity.
| Characteristic | [Unit] | Typ. value |
|---|---|---|
| Density | [g/cm3] | 8,3 |
| Elasticity Modulus | [kN/mm2] | 120 |
| Bending Strength | [N/mm2] | 120 |
| Compression Strength | [N/mm2] | 1000 |
| Hardness | [HV] | 500 |
| Specific electrical resistance | [μΩcm] | 55 |
| Specific heat | [J/kgK] | 370 |
| Specific thermal conductivity | [W/mK] | 10 |
| Curie temperature | [°C] | 720 |
| Temperature Coefficient – TK Br | [%/K] | -0,04 |
| Temperature Coefficient – iHc | [%/K] | -0,21 |
| Required magnetising field strength | [kA/m] | 2000 |
| REMAG Typical values | Remanence Br [T] | Coercivity HcB [kA/m] | Instrinsic Coercivity HcJ [kA/m] | Energy product (BH)max [kJ/m3] |
|---|---|---|---|---|
| Remag 19A | 0,9 | 660 | 2400 | 160 |
| Remag 19T | 0,95 | 720 | 1800 | 180 |
– variety of sensor applications in automotive and other industries
– high torque DC motors, etc.
Sintered AlNiCo magnets also excel in high maximum operating temperatures and good corrosion resistance. Sintering is better than casting for more complex forms and usually smaller dimensions.
The main advantages of cast AlNiCo magnets are high maximum operating temperature which can reach more than 500°C and also very good corrosion resistance. Casting is best suited for simple forms and larger dimensions.
SmCo magnets (including Sm2Co17) have much higher coercivity than AlNiCo magnets. This means that they are more resistant to demagnetizing fields. On the other hand they have still significantly higher maximum operating temperatures than NdFeB magnets.
+386 5 909 78 01