As another kind of rare-earth
permanent magnet--
Samarium Cobalt(the following called SmCo-magnet) is widely used second generation rare-earth
magnetic material.
SmCo magnet is made from
cobalt and samarium and other rare-earth elements, is a high performance
permanent magnet, it exhibits high magnetic performance characteristics in energy and coercive force. There are two compositions of magnets in this family: Sm1Co5 and Sm2Co17. The highest commercially available energy products of Sm2Co 17 are in the 30MGOe range. The 2:17(most popular) offers a better performance & lower temperature coefficient, however it is slightly more expensive and require very high
magnetic field to magnetise it.
SmCo-
magnet has higher maximum working temperatures than neodymium, although its maximum strengh is less. Its biggest advantage is its high working temperature up to 300 degree centigrade. In the meantime, its higher corrosion and oxidation resistance are also crucial. So SmCo
magnets usually need not be plated with other metal. The cost of
SmCo material is the most expensive, so SmCo-magnet is recommended only when its performance is a high temperature environment concerned
SmCo Magnet Features:
1.Excellent resisitance to corrosion and oxidation.
2.Extremely brritle.
3.Impossible to demagnetise.
4.High resistance to demagnetization
5.Suitable in a temperature of over 100c to 350c or hostil enviroments.
6.Various shapes and dimensions can be met.
7.Low temperature coefficent.
8.High performance.
Applications:robotics,machine,tools,relays,sensors,watch,motors,transducers,instruments,positional detectors,generators,radar and etc.
SmCo Magnet Properties:
Material | Grade | Energy Product BH(max) | Residual Induction Br(min-max) | Coercive Force Hcb(min-max) | Intrinsic Coercive Force Hcj(min-max) | Density | Max work Temp. |
KJ/m3 | MGoe | T | KGs | KA/m | KOe | KA/m | KOe | g/cm3 | ℃ |
SmCo5 | XG16 | 120-143 | 15-18 | 0.77-0.86 | 7.7-8.6 | 613-716 | 7.7-9.0 | >1194 | >15 | 8.3 | 250 |
XG16H | 120-143 | 15-18 | 0.77-0.86 | 7.7-8.6 | 613-716 | 7.7-9.0 | >1592 | >20 |
XG18 | 135-159 | 17-20 | 0.81-0.92 | 8.1-9.2 | 637-756 | 8.0-9.5 | >1194 | >15 |
XG18H | 135-159 | 17-20 | 0.81-0.92 | 8.1-9.2 | 637-756 | 8.0-9.5 | >1592 | >20 |
XG20 | 151-175 | 19-22 | 0.85-0.95 | 8.5-9.5 | 637-756 | 8.0-9.5 | >1194 | >15 |
XG20H | 151-175 | 19-22 | 0.85-0.95 | 8.5-9.5 | 637-756 | 8.0-9.5 | >1592 | >20 |
XG22 | 167-191 | 21-24 | 0.89-1.00 | 8.9-10 | 661-772 | 8.3-9.7 | >1194 | >15 |
XG22H | 167-191 | 21-24 | 0.89-1.00 | 8.9-10 | 661-772 | 8.3-9.7 | >1592 | >20 |
Sm2Co17 | XGS24M | 175-199 | 22-25 | 0.92-1.04 | 9.2-10.4 | 318-788 | 4.0-9.9 | 398-1194 | 5.0-15.0 | 8.4 | 350 |
XGS24 | 175-199 | 22-25 | 0.92-1.04 | 9.2-10.4 | 661-796 | 8.3-10.0 | 1194-1990 | 15.0-25.0 |
XGS24H | 175-199 | 22-25 | 0.92-1.04 | 9.2-10.4 | 661-804 | 8.3-10.1 | 1990 | 25.0 |
XGS26M | 191-215 | 24-27 | 1.00-1.06 | 10.0-10.6 | 318-796 | 4.0-10.0 | 398-1194 | 5.0-15.0 |
XGS26 | 191-215 | 24-27 | 1.00-1.06 | 10.0-10.6 | 677-820 | 8.5-10.3 | 1194-1990 | 15.0-25.0 |
XGS26H | 191-215 | 24-27 | 1.00-1.06 | 10.0-10.6 | 677-820 | 8.5-10.3 | 1990 | 25.0 |
XGS28M | 207-231 | 26-29 | 10.4-11.0 | 10.4-11.0 | 318-804 | 4.0-10.1 | 398-1194 | 5.0-15.0 |
XGS28 | 207-231 | 26-29 | 10.4-11.0 | 10.4-11.0 | 677-820 | 8.5-10.3 | 1194-1990 | 15.0-25.0 |
XGS28H | 207-231 | 26-29 | 10.4-11.0 | 10.4-11.0 | 677-820 | 8.5-10.3 | 1990 | 25.0 |
XGS30M | 223-247 | 28-31 | 10.7-11.2 | 10.7-11.2 | 318-804 | 4.0-10.1 | 398-1194 | 5.0-15.0 |
XGS30 | 223-247 | 28-31 | 10.7-11.2 | 10.7-11.2 | 700-828 | 8.8-10.4 | 1194-1990 | 15.0-25.0 |
XGS30H | 223-247 | 28-31 | 10.7-11.2 | 10.7-11.2 | 700-828 | 8.8-10.4 | 1990 | 25.0 |
XGS32M | 231-255 | 29-32 | 10.9-11.5 | 10.9-11.5 | 318-804 | 4.0-10.1 | 398-955 | 5.0-12.0 |
XGS32 | 231-255 | 29-32 | 10.9-11.5 | 10.9-11.5 | 716-836 | 9.0-10.5 | 955 | 12.0 |
XGS22LT | 159-183 | 20-23 | 9.0-9.9 | 9.0-9.9 | 677-756 | 8.5-9.5 | >1194 | >15.0 |
XGS24LT | 159-183 | 20-23 | 9.2-10.2 | 9.2-10.2 | 677-756 | 8.5-9.5 | >1194 | >15.0 |