SmCo Magnets

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