Sintered Samarium Cobalt Magnet
Sintered Samarium Cobalt (SmCo) magnets are manufactured by using powder metallurgy techniques, which include stringent process controls and complicated heat tr
Sintered Samarium Cobalt (SmCo) magnets are manufactured by using powder metallurgy techniques, which include stringent process controls and complicated heat treatment, cycles. The composition of this Sintered SmCo magnets alloy is approximately 35% Samarium, 60% cobalt with the balance being Fe & Cu. By varying the percentages of this composition and changing the sintering & heat treatment cycles the two grades 1:5 & 2:17 are produced. The difference between them is in energy product, temperature coefficient and magnetisation force required to saturate. The 2:17 Sintered SmCo magnets (most popular) offers a better performance & lower temperature coefficient, however it is slightly more expensive and requires very high fields to magnetise it.
An alloy compose of SmCo5/Sm2Co17; Limited raw material supply result high in cost; High resistance to demagnetization; Energy products go up to 32 MGOe, suitable for using in a temperature of over 100 °C to 350°C or hostile environments; Various shapes and dimensions can be met; low temperature coefficient; High performance and Extremely brittle; Outstanding thermal stability; Excellent resistance to corrosion and oxidation, no coating is needed for surface protecting.
Sintered Samarium Cobalt magnet is suitable for machines with high magnetic requirements Good for strict working environment requirement. robotics, machine tools to relays sensors, UHV magnetrons, motors, watch, transducers, instruments, positional detector, generators, radar and so on. Electronic magnetron, Magnetic Transmission, Magnetic Treatment, Magnistor, Etc.
| Grade | Residual Fulx Br | Coercive Force Hcb | Intrinsic Coercive force Hcj | Max. Energy Product (BH) max | |||||
|---|---|---|---|---|---|---|---|---|---|
| mT | kGs | kA/m | koe | kA/m | koe | kJ/m3 | MGoe | ||
| SMCO 1:5 | SmCo5-YX16 | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥1591 | ≥20.0 | 127±16 | 16±2 |
| SmCo-YX16A | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥1989 | ≥25.0 | 127±16 | 16±2 | |
| SmCo-YX16B | 750~880 | 7.5~8.8 | 597±40 | 7.5±0.5 | ≥2386 | ≥30.0 | 127±16 | 16±2 | |
| SmCo-YX18A | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1591 | ≥20.0 | 143±16 | 18±2 | |
| SmCo-YX18T | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1591 | ≥20.0 | 143±16 | 18±2 | |
| SmCo-YX18B | 800~930 | 8.0~9.3 | 637±40 | 8.0±0.5 | ≥1989 | ≥25.0 | 143±16 | 18±2 | |
| SMCO 2:17 | SmCo-YX20 | 900~950 | 9.0~9.5 | ≥670 | 8.5~9.2 | ≥1591 | ≥20.0 | 159±16 | 20±2 |
| SmCo-YX20A | 900~980 | 9.0~9.8 | 637±40 | 8.0±0.5 | ≥1989 | ≥25.0 | 159±16 | 20±2 | |
| SmCo-YX22 | 900~1030 | 9.0~10.3 | 653±40 | 8.2±0.5 | ≥1432 | ≥18.0 | 175±16 | 22±2 | |
| SmCo-YX22A | 900~1030 | 9.0~10.3 | 653±40 | 8.2±0.5 | ≥1989 | ≥25.0 | 175±16 | 22±2 | |
| SmCo-YX24 | 950~1080 | 9.5~10.8 | 676±40 | 8.2±0.5 | ≥1432 | ≥18.0 | 191±16 | 24±2 | |
| SmCo-YX24A | 1000~1100 | 10.0~11.0 | 676±40 | 8.2±0.5 | ≥1989 | ≥25.0 | 191±16 | 24±2 | |
| SmCo-YX26 | 1000~1130 | 10.0~11.3 | 357~516 | 4.5~6.5 | 413~556 | 5.0~7.0 | 207±16 | 26±2 | |
| SmCo-YX26A | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥796 | ≥10.0 | 207±16 | 26±2 | |
| SmCo-YX26B | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥1194 | ≥15.0 | 207±16 | 26±2 | |
| SmCo-YX26C | 1000~1130 | 10.0~11.3 | 716±40 | 9.0±0.5 | ≥1591 | ≥20.0 | 207±16 | 26±2 | |
| SmCo-YX26D | 1000~1080 | 10.0~10.8 | ≥732 | 9.0~10.5 | ≥2300 | ≥30.0 | 207±16 | 26±2 | |
| SmCo-YX28 | 1060~1180 | 10.6~11.8 | 357~516 | 4.5~6.5 | 413~556 | 5.0~7.0 | 223±16 | 28±2 | |
| SmCo-YX28A | 1060~1180 | 10.6~11.8 | 763±40 | 9.6±0.5 | ≥796 | ≥10.0 | 223±16 | 28±2 | |
| SmCo-YX28B | 1050~1150 | 10.5~11.5 | ≥750 | 9.4~9.8 | ≥960 | ≥12.0 | 223±16 | 28±2 | |
| SmCo-YX28C | 1060~1180 | 10.6~11.8 | 763±40 | 9.6±0.5 | ≥1194 | ≥15.0 | 223±16 | 28±2 | |
| SmCo-YX30 | 1100~1200 | 11.0~12.0 | 438~597 | 5.5~6.5 | 454~597 | 5.7~7.5 | 238±16 | 30±2 | |
| SmCo-YX30A | 1100~1200 | 11.0~12.0 | ≥560 | 7.0~8.5 | ≥716 | ≥12.0 | 238±16 | 30±2 | |
| SmCo-YX30B | 1100~1200 | 10.8~11.2 | 796-859 | 10.0-10.8 | ≥1990 | ≥25.0 | 223-247 | 28.0-31.0 | |
| SmCo-YX32 | ≤1120 | ≤11.2 | ≤557 | ≥7.0 | ≥637 | ≥8.0 | ≥239 | ≥30.0 | |
| Curie Temp. | Tc | ℃ | 800-850 | Coeff. of thermal expansion | C// | 1/℃ | ~8×10-5 |
|---|---|---|---|---|---|---|---|
| Density | D | g/cm3 | 8.3~8.5 | C⊥ | 1/℃ | ~11×10-5 | |
| Recoil Permeability | μrec | 1.00~1.05; | Rigidity strength | N/m2 | ~1.5×108 | ||
| Max. Working Temp. | Tmax | ℃ | 350 | Compress strength | N/m2 | ~8×108 | |
| Electrical Resistivity | Ω.Cm | 8.6×105 | Tensile stength | N/m2 | ~3.5×107 | ||
| Vickers Hardness | Hv | 500~600 | Young's Modulus | N/m2 | ~1.2×1011 | ||
| Thermal Conduct rate | W/mK | ~12 | Magnetization field Ha | kA/m | ≥1600 | ||
