SmCo magnet is a high performance, low temperature coefficent permanent magnet made of samarium and cobalt and other rare-earth elements. Its biggest advantage is its high working temperature---350 degree centigrade. It needn't to be coated because it is difficult to be eroded and oxidized. SmCo magnet is widely used in motors, watch, transducers, instruments, positional detector, generators, radar and etc.
Magnetic Characteristic:
| Materials | Code | Remanence | Coercivity force | Intrinsic Coercivity force | Max. energy product | Curie temp. | Max. operating temp. | ||||
| Br | bHc | iHc | (BH)max | TC | TW | ||||||
| T | KGs | KA/m | KOe | KA/m | KOe | HJ/m3 | MGOe | ºC | ºC | ||
| SmCo (1:5) |
YX-18 | 0.85 | 8.5 | 620 | 7.8 | ≥1350 | ≥17 | 145-150 | 17-19 | 750 | 250 |
| YX-20 | 0.90-0.96 | 9.0-9.6 | 653-717 | 8.2-9.0 | 1194-1513 | 15-19 | 150-175 | 19-22 | 750 | 250 | |
| YX-24 | 1.0 | 10.0 | 680 | 8.5 | ≥1195 | ≥15 | 175-190 | 22-24 | 750 | 250 | |
| YX-26 | 1.02 | 10.2 | 750 | 9.5 | ≥1195 | ≥15 | 195-215 | 24-26 | 750 | 250 | |
| SmCo(2:17) |
YXG-24 | 0.95-1.02 | 9.5-10.2 | 637-732 | 8.0-9.2 | 1433-1990 | 18-25 | 175-190 | 22-24 | 800 | 300 |
| YXG-26 | 1.02-1.05 | 10.2-10.5 | 748-796 | 9.4-10.0 | 1433-1990 | 18-25 | 195-215 | 24-26 | 800 | 300 | |
| YXG-28 | 1.05-1.08 | 10.5-10.8 | 756-796 | 9.5-10.0 | 1433-1831 | 18-23 | 205-220 | 26-28 | 800 | 300 | |
| YXG-30 | 1.08 | 10.8 | 780 | 9.8 | ≥955 | ≥15 | 220-240 | 28-30 | 800 | 300 | |
Physical Property:
| Temperature Coefficent of Remanence(%/℃) | Curie Temperature(℃) | Density (g/cm3) |
Vickers Hardness(HV) | Max. Working temperature(℃) | |
| SmCo5 | -0.05 | 700-750 | 8.2-8.4 | 450-500 | 250 |
| SmCo17 | -0.03 | 800-850 | 8.3-8.5 | 500-600 | 300 |
Production Process:
Raw Materials → Burdening → Melting → Milling →Pressing
Sintering & Tempering →Pre-inspection → Machining → Inspection →Packing
Size available.
The largest size:
disk:dia100x50mm ring:dia100-90x50mm block:100x100x50mm
The smallest size:
disk:dia1.5x0.5mm ring:dia2.8-1x0.5mm block:3x2x1mm
Note:
The advantages of SmCo magnet is its resistibility to rust and
can work at a higher temperature, so SmCo magnet usually need
not any plating. You must be careful to SmCo magnets when you
assemble them due to it is very brittle.
SmCo plastic bonded magnet is made by grinding sintered SmCo magnets. SmCo powder is mixed with resin and molded like Nd-Fe-B plastic bonded magnet and has been produced without secondary processing. For it has high resistance to orrosion, it is free of coating.
Bonded| SmCo(1:5) | Yb-6 | 0.4 | 4.0 | 280 | 3.5 | 800 | 10 | 30-50 | 4-6 | / | 120 |
| Yb-10 | 0.5 | 5.0 | 320 | 4.0 | 800 | 10 | 50-65 | 6-8 | / | 120 | |
| SmCo(2:17) | YbG-10 | 0.6 | 6.0 | 360 | 4.5 | 800 | 10 | 65-80 | 8-10 | / | 120 |
| YbG-12 | 0.7 | 7.0 | 400 | 5.0 | 800 | 10 | 80-95 | 10-12 | / | 120 |
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