Sintered Samarium Cobalt Segment Magnet Sm2Co17

Sintered Samarium Cobalt Segment Magnet Sm2Co17 For Motor, High Temperature Sintered SmCo Arc Magnet, Powerful Rare Earth Permanent Magnets, Segment Laminated Magnet Samarium Cobalt, Generator rotor magnet, segmented magnets China supplier

Sintered Samarium Cobalt Segment Magnet Sm2Co17 Item No. MPCO-SMOS  series
Customzied Specific Requirements
OEM or ODM service: Accept
Dimension: Customized size
Custom Grade: SmCo5,  Sm2Co17
Magnetization direction: Thickness, Length, Axially, Diametre, Radially, Multipolar
Surface Treatment: UNCOATED, Silver, Gold, Zinc, Ni-cu-Ni. Epoxy etc.
Tolerance: +/-0.02 – 0.05mm
Application: SmCo rare earth permanent magnets are widely applied in Auto, energy-efficient Motors and Generators, Machinery, Audio/Video and Communication Equipment, Medical Device(MRI), Office Automation, Magnetic Separator, etc.

Samarium Cobalt is also known as SmCo, Rare Earth Cobalt, RE Cobalt, RECo and CoSm.

Samarium Cobalt (SmCo) magnets are not as strong as the Neodymium (NdFeB) magnets (maximum energy product of between 30 and 50 MGOe) but they have three significant advantages. The SmCo magnets work over a wider temperature range, have superior temperature coefficients and have much greater corrosion resistance.

Samarium Cobalt (SmCo) magnets can be used over a massive temperature range. A few Neodymium magnet grades can be used at temperatures up to 220 degrees C. The SmCo magnets start to outperform the NdFeB magnets around 150-180 degrees C. Also, Samarium Cobalt magnets are ideal for very low temperature applications (SmCo can be used down to a few Kelvin above Absolute Zero) making them a first choice magnet for cryogenic applications. They can also be used in very high temperatures – up to +250 deg C or +300/+350 degrees C depending on the grade; the SmCo26 is rated to +300 degreec C)

Samarium Cobalt Generator rotor segmented magnet

The flux output of the Samarium Cobalt (SmCo) magnets is more stable with changes in temperature than NdFeB magnets due to having better temperature coefficients (e.g. -0.030%/°C for change in Br versus -0.100%/°C for NdFeB and -0.20%/°C for change in Hci versus -0.60%/°C for NdFeB). This can be particularly useful in critical applications such as sensors (although Alnico can be a better choice for temperature stability). It also means that Samarium Cobalt can resist demagnetisation better than Neodymium in higher temperature applications such as motors.

Samarium Cobalt (SmCo) magnets contain less free iron than Neodymium magnets and therefore provide better corrosion resistance than Neodymium magnets. It is very rare for SmCo magnets to require protective plating (a notable exception is the use of nickel plating for soldering the magnets to printed circuit boards). Sm1Co5 contains no iron so has excellent corrosion resistance. Sm2Co17 has some free iron that may corrode on the magnet surface when exposed directly to water. Sm2Co17 is still, for most applications (other than marineenvironments) regarded as having good to very good corrosion resistance (in marine applications the magnet can be given a simple low cost protective coating such as NiCuNi to prevent any corrosion possibilities) and the corrosion resistance is still far superior compared to NdFeB.

Sintered Samarium Cobalt Magnets

These characteristics therefore make Samarium Cobalt (SmCo) suitable for applications such as pump couplings, sensors, loudspeakers, generators, guitar pick-ups, motors, sump plugs, high temperature applications, wide temperature range applications and for use in corrosive (e.g. water, oil) environments, marine applications, automotive, aerospace and military applications.

We offer bespoke sintered SmCo magnets. Standard magnet tolerances are +/-0.1mm with +/-0.05mm available for slightly higher cost. We can also produce the SmCo magnets with tolerances down towards +/-0.005mm as part of our Precision Magnets range although we will specify the tolerances that can be achieved for each shape (the Precision Magnets range is limited to small sized magnets and also to 100k minimum order quantity). Heat Resistant YXG-28 Samarium Cobalt Permanent Magnet

Features of SmCo Magnets
1. SmCo magnets are high performance, low temperature coefficient permanent magnets.
2. Its biggest advantage is high working temperature-300 degree centigrade, this makes Samarium Cobalt an excellent choice for compact designs where high temperature environments may be present.
3. Good corrosion resistance and no need to be coating, because it is difficult to be eroded and oxidized.
4. Grinding and slicing can be operated into the desired shape and size.