Ring Sm2co17 magnets
Samarium cobalt magnets are composed of samarium, cobalt and iron.These rare earth magnets are extremely strong for their small size,metallic in appearance and found in simple shapes such as rings,blocks and discs.
Samarium cobalt magnets are composed of samarium, cobalt and iron.These rare earth magnets are extremely strong for their small size,metallic in appearance and found in simple shapes such as rings,blocks and discs.
According the composition,we divide two of SMCO: Sm2CO17 and SmCo5
According the process,we divide to sintered Smco and bonded Smco
Ring Sm2co17 magnets are made of metal samarium,cobalt,copper,iron,zirconium,according percentage to melting,grinding,profiling,sintering,aging,and make of various grades,shapes and sizes.
The (BH)max between 20-32,the maximum operating temperature can be reached 350 °C,the 2:17 has a low temperature coefficient (-0.02% / ℃) and good corrosion resistance,magnetic properties is more than NdFeB magnets when in high working temperatures.
Sm2co17: not only has a high intrinsic saturation magnetic inductio.but also good anti-oxidation.
Applications
aerospace fields
military fields
high temperature motor
automotive sensors
variety of magnetic drive
magnetic drive pump
microwave devices
Computer disc drives
Sensors
Radar
Traveling wave tubes
Satellite systems
Motors where temporary stability is vital
Compare of Ring Sm2co17 magnets and SmCo5 auxiliary magnetic and physical properties
Item | Parameters | SmCo5 | Sm2Co17 |
Auxiliary magnetic properties | Temp. coefficient of Br (α(Br))/%/ K-1 | -0.05 | -0.03 |
Temp. coefficient. of Hcj (α(Hcj)/%/ K-1 | -0.3 | -0.3 | |
Curie Temperature (Tc)/K | 1000 | 1000 | |
Recoil Permeability (μrec) | 1.05 | 1.10 | |
physical properties | Density (g/cm-3) | 8.2 | 8.4 |
Vickers Hardness Hv/MPa | 450 | 650 | |
Electrical Resistivity (ρ/Ω•.cm) | 5.3x10-5 | 8.5x10-5 | |
Compressive Strengthδc/MPa | 1000 | 800 | |
Tensile Strength δb/ MPa | 400 | 350 | |
Bending Strength δw/MPa | 180 | 150 |
the magnetic properties of rare earth magnet
item | Js/T | (BH)m /KJ.m-3 | HA /MA.m-1 | Tc/℃ | RE/TM | TM |
SmCo5 | 1.15 | 248 | 32 | 740 | 0.166 | Co |
Sm2Co17 | 1.56 | 480 | 8 | 890 | 0.105 | Co |
Nd2Fe14B | 1.61 | 528 | 6 | 310 | 0.117 | Fe |
