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Samarium Cobalt

Samarium-cobalt magnet

Samarium-cobalt magnet is a kind of rare earth permanent magnet material with high temperature resistance, excellent thermal stability and high coercivity. The main raw materials of samarium-cobalt magnet are samarium and cobalt.The samarium-cobalt magnet with a certain shape is produced by furnace. powder manufacturing, pressing molding, sintering and precisely machining. Although the room temperature magnetic property of samarium-cobalt magnet is inferior to that of NdFeB magnet, its thermal stability is more than10 times that of NdFeB magnet. When the temperature exceeds 150C, the magnetic energy product, coercivity and thermal stability of samarium cobalt magnet all exceed that of NdFeB magnet. Samarium cobalt is the best permanent magnetic material with excellent thermal stability at present.

 

 ∇ Low Cost
 ∇ Strong Corrosion Resistance
 ∇ Temperature range between 250°C and 550°C
 ∇ Strong Demagnetization Resistance

 ∇ High Corrosion Resistance; Highly resistant to oxidation

 

 

Typical Physical Properties of Samarium Cobalt Materials

 

Physical Characteristics unit SmCo5 Sm2Co17
Density g/cm3 8.1 - 8.6 8.2-8.5
Tc °C 750 850
Bending Strength MPa 120 - 180 80 - 160
Compressive Strength MPa 1000 - 1200 800 - 1200
Tensile Strength MPa 40 35
Fracture Toughness MPa • m1/2 1 - 2 1.5 - 2.5
Modulus of Elasticity MPa 1.3 x 105 2 x 105
Modulus of Rigidity MPa / 8 x 104
Poisson Ratio / / 0.2
HV / 400 - 500 500 - 650
Resistivity µΩ • cm 0.5 - 0.6 0.8 - 0.9
Thermal Conductivity W • (m •°C)-1 11 10
Specific Heat kJ (kg •°C)-1 0.37 0.35
Thermal Expansion Coefficient Lcaxis x10-6 K 7 8
Llc axis 15 11

 

Magnetic Properties

1 T = 10 kGs = 10000 Gs ; 1 kOe = 79.6 kA/m ; 1 MGOe = 7.96 kJ/m3

Material Grade Br Remanence Hcb Coercivity Hcj Intrinsic Coercivity (BH) Maximum Energy Product Tw α (Br) (20°C - 150°C)
kGs kOe kOe MGOe °C %/°C
SmCo5 XG6 5.0 - 5.8 4.7 - 5.7 >20 6 - 8 250 -0.04
XG8 5.8 - 6.5 5.4 - 6.4 >20 8 - 10
XG10 6.4 - 7.2 6.0 - 7.1 >20 10 - 12
XG12 7.0 - 7.6 6.5 - 7.4 >20 12 - 14
XG14 7.5 - 8.2 7.0 - 8.0 >20 14 - 16
XG16 7.7 - 8.6 7.2 - 8.4 >20 15 - 18
XG18 8.2 - 9.0 7.8 - 8.8 >20 16 - 20
XG20 8.6 - 9.2 8.2 - 9.0 >20 18 - 21
XG22 9.0 - 9.5 8.5 - 9.3 >20 20 - 23
XG24 9.5 - 9.8 8.6 - 9.2 >20 22 - 24
XG26 >9.8 >9.0 >18 24 - 26
Sm2Co17 XGS6 5.0 - 5.8 4.5 - 5.7 >18 6 - 8 350 - 0.035
XGS8 5.8 - 6.5 5.4 - 6.4 >18 8 - 10
XGS10 6.4 - 7.2 6.0 - 7.1 >18 10 - 12
XGS12 7.0 - 7.6 6.5 - 7.4 >18 12 - 14
XGS14 7.5 - 8.2 7.0 - 8.0 >18 14 - 16
XGS16 7.7 - 8.6 7.2 - 8.4 >18 15 - 18
XGS18 8.2 - 9.0 7.8 - 8.8 >18 16 - 20
XGS20L 8.6 - 9.4 4.5 - 9.2 5 - 18 18 - 22
XGS20 8.6 - 9.4 7.8 - 9.2 18 - 25 18 - 22
XGS20H 8.6 - 9.4 7.8 - 9.2 >25 18 - 22
XGS22L 9.0 - 9.7 4.5 - 9.0 5 - 18 20 - 24
XGS22 9.0 - 9.7 8.3 - 9.5 18 - 25 20 - 24
XGS22H 9.0 - 9.7 8.3 - 9.5 >25 20 - 24
XGS24L 9.5 - 10.0 4.5 - 9.5 5 - 18 22 - 26
XGS24 9.5 - 10.0 8.6 - 9.7 18 - 25 22 - 26
XGS24H 9.5 - 10.0 8.6 - 9.7 >25 22 - 26
XGS26L 10.0 - 10.4 4.5 - 10.0 5 - 18 24 - 27
XGS26 10.0 - 10.4 9.0 - 10.1 18 - 25 24 - 27
XGS26H 10.0 - 10.4 9.0 - 10.1 >25 24 - 27
XGS28L 10.4 - 10.8 4.5 - 10.1 5 - 18 26 - 28
XGS28 10.4 - 10.8 9.5 - 10.5 18 - 25 26 - 28
XGS28H 10.4 - 10.8 9.5 - 10.5 >25 26 - 28
XGS30L 10.8 - 11.1 4.5 - 10.5 5 - 18 28 - 30
XGS30 10.8 - 11.1 9.8 - 10.8 18 - 25 28 - 30
XGS30H 10.8 - 11.1 9.8 - 10.8 >25 28 - 30
XGS32L 11.1 - 11.4 4.5 - 10.8 5 - 18 30 - 32
XGS32 11.1 - 11.4 10.1 - 11.0 18 - 25 30 - 32
XGS32H 11.1 - 11.4 10.1 - 11.0 >25 30 - 32
XGS33L 11.3 - 11.5 4.5 - 11.0 5 - 18 31 - 33
XGS33 11.3 - 11.5 10.4 - 11.2 18 - 25 31 - 33
XGS33H 11.3 - 11.5 10.4 - 11.2 >25 31 - 33
XGS34L 11.4 - 11.7 4.0 - 11.0 5 - 18 32 - 34
XGS34 11.4 - 11.7 10.4 - 11.4 18 - 25 32 - 34
XGS34H 11.4 - 11.7 10.4 - 11.4 >25 32 - 34
XGS35L 11.6 - 11.9 4.5 - 11.2 5 - 18 33 - 35
XGS35 11.6 - 11.9 10.6 - 11.5 18 - 25 33 - 35
XGS35H 11.6 - 11.9 10.6 - 11.5 >25 33 - 35
XGS36L 11.8 - 12.3 4.5 - 11.5 5 - 18 34 - 36
XGS36 11.8 - 12.3 10.9 - 11.6 18 - 25 34 - 36
XGS36H 11.8 - 12.3 10.9 - 11.6 >25 34 - 36
Low Temperature Coeff. Sm2Co17 XGS16LT 7.7 - 8.2 6.8 - 7.6 >20 14 -16 350 ±0.005
XGS18LT 8.2 - 8.6 7.4 - 8.2 >20 16 - 18
XGS20LT 8.6 - 9.2 8.6 - 9.2 >20 18 - 20
XGS22LT 9.2 - 9.7 9.2 - 9.7 >20 20 - 22 -0.005
XGS24LT >9.5 >8.7 >20 22 - 24
High Temperature Resistance Sm2Co17 XGS20HT 8.6 - 9.2 7.8 - 8.8 >25 18 - 20 550 -0.06
XGS22HT 9.2 - 9.7 8.2 - 9.2 >25 20 - 22
XGS24HT 9.5 - 10 8.6 - 9.7 >25 22 - 24
XGS26HT >10.0 >9.0 >25 24 - 27

 

Low Temp. Coeff. Magnets

Features: Within a certain temperature range, Br of SmCo does not change with temperature. Low temperature coefficient magnets can generally be used in various precision instruments, gyroscopes and automatic driving etc. Our company can prepare zero temperature coefficient and positive temperature coefficient magnets.

 

Samarium-cobalt magnet

 

High Temperature Resistant Magnets

Features: Magnets can be used at more than 550℃. The coercivity of high temperature resistant magnet prepared by our company at 550°C is still 6.51 kOe, and the magnetic loss at high temperature is less than 5%.

 

 

Process Flow

Samarium-cobalt magnet

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Samarium-cobalt magnet is a kind of rare earth permanent magnet material with high temperature resistance, excellent thermal stability and high coercivity. The main raw materials of samarium-cobalt magnet are samarium and cobalt.The samarium-cobalt magnet with a certain shape is produced by furnace. powder manufacturing, pressing molding, sintering and precisely machining. Although the room temperature magnetic property of samarium-cobalt magnet is inferior to that of NdFeB magnet, its thermal stability is more than10 times that of NdFeB magnet. When the temperature exceeds 150C, the magnetic energy product, coercivity and thermal stability of samarium cobalt magnet all exceed that of NdFeB magnet. Samarium cobalt is the best permanent magnetic material with excellent thermal stability at present.    ∇ Low Cost  ∇ Strong Corrosion Resistance  ∇ Temperature range between 250°C and 550°C  ∇ Strong Demagnetization Resistance  ∇ High Corrosion Resistance; Highly resistant to oxidation     Typical Physical Properties of Samarium Cobalt Materials   Physical Characteristics unit SmCo5 Sm2Co17 Density g/cm3 8.1 - 8.6 8.2-8.5 Tc °C 750 850 Bending Strength MPa 120 - 180 80 - 160 Compressive Strength MPa 1000 - 1200 800 - 1200 Tensile Strength MPa 40 35 Fracture Toughness MPa • m1/2 1 - 2 1.5 - 2.5 Modulus of Elasticity MPa 1.3 x 105 2 x 105 Modulus of Rigidity MPa / 8 x 104 Poisson Ratio / / 0.2 HV / 400 - 500 500 - 650 Resistivity µΩ • cm 0.5 - 0.6 0.8 - 0.9 Thermal Conductivity W • (m •°C)-1 11 10 Specific Heat kJ (kg •°C)-1 0.37 0.35 Thermal Expansion Coefficient Lcaxis x10-6 K 7 8 Llc axis 15 11  

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