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SmCo Magnet

PRODUCT DESCRIPTION


SmCo Magnets Introduction


SmCo magnets known as Samarium, Samarium Cobalt or rare earth Cobalt magnets, are the second generation of rare earth permanent magnets. According to the difference between the production technologies, SmCo can be divided into bonded SmCo and sintered SmCo, but we are only specialized in sintered SmCo.

The sintered SmCo are anisotropic and can only be magnetized in the orientation direction. They consist mainly of Sm (Samarium) and Co (Coblat), and they are available with two series of materials, SmCo5 and Sm2Co17 often referred to as SmCo 1:5 and SmCo 2:17. SmCo5 have lower energy, Hcj (intrinsic coercive force), maximum operation temperature and Curie temperature than Sm2Co17, but SmCo5 are easier to magnetize to saturation. They are available in a number of grades that span a wide range of properties and application requirements. They are powerful, with (BH)max range of 14MGOe~32MGOe; however, they are also very brittle and prone to cracking and chipping, so they must be handled with care and adequate protective gear. Due to their relative frailty, mechanisms and applications in which the magnets are used must be adapted and designed to support the material.


SmCo Magnet Characteristics


---High magnetic values – Br high to 11.3 kGs (1.13 T) and (BH)max high to 32 MGOe (255 kJ/m3)

---High working temperature – maximum working temperature high to 250ºC~350ºC

---Outstanding thermal stability – α(Br) low to -0.03 %/ºC and β(Hcj) low to -0.2%/ºC

---Excellent corrosion resistance – no surface treatment needed

---Excellent demagnetization resistance – maximum Hcj higher than 25 kOe (1990 kA/m)


Applications of SmCo Neodymium Magnet


Due to their characteristics above, SmCo is the ideal magnetic material in the following applications, particularly where the magnets are required to operate at high temperatures, across a broad temperature range, with the stable magnetic field, or in a corrosive environment: travelling wave tubes, circulators, isolators, speakers, magnetron sputtering cathodes, sensors, servo motors, pump couplings, chemical pumps, magnetic assemblies, etc


SmCo Magnet Physical Properties


CharacteristicsReversible Temperature Coefficient 20-150ºC, α(Br)Reversible Temperature Coefficient 20-150ºC, β(Hcj)Coefficient of Thermal ExpansionThermal ConductivitySpecific HeatCurie TemperatureFlexural StrengthDensityHardness, VickersElectrical Resistivity
Unit%/ºC%/ºCΔL/L per ºCx10-6kcal/mhrºCcal/gºCºCMpag/cm3HvμΩ • cm
SmCo5-0.04-0.2//6⊥129.50.072750150-1808.3450-55050~60
Sm2Co17-0.03-0.2//9⊥118.50.068850130-1508.4550-65080~90



Magnet Magnetic Properties


MaterialGradeResidual InductionCoercivityIntrinsic CoercivityMaximum Energy ProductDensityTemp. Coefficient 20-150 °CCurie Temp.Maximum Operating Temp.
BrHcbHcj(BH )maxDα(Br)β(Hcj)TcTw
TkGkA/mkOekA/mkOekJ/m3MGOeg/cm3%/°C%/°C°C°C
SmCo5YX160.79-0.857.9-8.5612-6607.7-8.3>1194>15110-13514-178.3-0.04-0.20750250
YX16H0.79-0.857.9-8.5612-6607.7-8.3>1592>20110-13514-178.3-0.04-0.20750250
YX180.84-0.908.4-9.0644-7008.1-8.8>1194>15127-15116-198.3-0.04-0.20750250
YX18H0.84-0.908.4-9.0644-7008.1-8.8>1592>20127-15116-198.3-0.04-0.20750250
YX200.89-0.948.9-9.4676-7258.5-9.1>1194>15143-16718-218.3-0.04-0.20750250
YX20H0.89-0.948.9-9.4676-7258.5-9.1>1592>20143-16718-218.3-0.04-0.20750250
YX220.92-0.969.2-9.6710-7488.9-9.4>1194>15160-18320-238.3-0.04-0.20750250
YX22H0.92-0.969.2-9.6710-7488.9-9.4>1592>20160-18320-238.3-0.04-0.20750250
YX240.95-1.009.5-10.0730-7809.2-9.8>1194>15175-19922-258.3-0.04-0.20750250
YX24H0.95-1.009.5-10.0730-7809.2-9.8>1592>20175-19922-258.3-0.04-0.20750250
Sm2Co17YXG220.93-0.979.3-9.7676-7408.5-9.3>1433>18160-18320-238.4-0.03-0.20850350
YXG22H0.93-0.979.3-9.7676-7408.5-9.3>1990>25160-18320-238.4-0.03-0.20850350
YXG240.95-1.029.5-10.2692-7648.7-9.6>1433>18175-19122-248.4-0.03-0.20850350
YXG24H0.95-1.029.5-10.2692-7648.7-9.6>1990>25175-19122-248.4-0.03-0.20850350
YXG26M1.02-1.0510.2-10.5541-7806.8-9.8636-14338-18191-20724-268.4-0.03-0.20850300
YXG261.02-1.0510.2-10.5748-7969.4-10.0>1433>18191-20724-268.4-0.03-0.20850350
YXG26H1.02-1.0510.2-10.5748-7969.4-10.0>1990>25191-20724-268.4-0.03-0.20850350
YXG28M1.03-1.0810.3-10.8541-7966.8-10.0636-14338-18207-22326-288.4-0.03-0.20850300
YXG281.03-1.0810.3-10.8756-8129.5-10.2>1433>18207-22326-288.4-0.03-0.20850350
YXG28H1.03-1.0810.3-10.8756-8129.5-10.2>1990>25207-22326-288.4-0.03-0.20850350
YXG30M1.08-1.1010.8-11.0541-8356.8-10.5636-14338-18223-24028-308.4-0.03-0.20850300
YXG301.08-1.1010.8-11.0788-8359.9-10.5>1433>18223-24028-308.4-0.03-0.20850350
YXG30H1.08-1.1010.8-11.0788-8359.9-10.5>1990>25223-24028-308.4-0.03-0.20850350
YXG32M1.10-1.1311.0-11.3541-8446.8-10.6636-14338-18230-25529-328.4-0.03-0.20850300
YXG321.10-1.1311.0-11.3812-84410.2-10.6>1433>18230-25529-328.4-0.03-0.20850350
YXG32H1.10-1.1311.0-11.3812-84410.2-10.6>1990>25230-25529-328.4-0.03-0.20850350
Low Temp. Coefficient Sm2Co17YXG22LT0.94-0.989.4-9.8668-7168.4-9.0>1194>15167-18321-238.4-0.015-0.20850350

Remarks:

1. The above-mentioned data of properties are given at room temperature.

2. The maximum operating temperature of magnets is shape/geometry dependent.

3. These are standard grades and others are available upon request. Where practical we will produce grades for specific applications.


Reminder to Use SmCo Magnet


1. Sintered SmCo permanent magnetic material is brittle, so it is not suitable for structural parts. The mechanical and physical property of 1:5 SmCo magnets is better than 2:17 SmCo magnets and slightly easier to process. Magnetized SmCo magnets must be taken carefully one by one in the process of assembling. Keep the Samarium Cobalt magnets away from the iron so as not to collide and break the magnet, and avoid two pieces of magnets attract, collide, damage, cause harm to the human body.

2. Sintered SmCo permanent magnets will produce small corner because of slight collision during the process of production, packing, and transportation, which affects the appearance of SmCo magnets, but does not affect the stability and resistance to demagnetization of the magnets, so it can be used normally.

3. If you want to use rare earth Cobalt magnets in an acid-base environment and another bad environment, we can do electroplating treatment on the magnets. We can make Nickel-coated SmCo magnets, Zinc-coated SmCo magnets, Epoxy-coated SmCo magnets etc.

4. If the users need un-magnetized SmCo magnets, they must be familiar with the magnetizing energy of their own magnetizing equipment, in order to choose the correct magnet grades which can be completely full magnetized.


We are a professional supplier of neodymium magnets and motor magnets, contact us for the best prices on magnets.

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