Compression Molded SmCo Permanent Magnets

/Compression Molded SmCo Permanent Magnets
  • Compression Molded SmCo Magnets
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  • Compression Molded SmCo Permanent Magnets, Customized Size Compression & Injection Mold Bonded Samarium Cobalt Magnets, anisotropic & isotropic bonded SmCo5 / Sm2Co17 permanent magnets, Plastic Polymer Bonded Samarium Hot Pressed Magnet, Permanent Magnet China Supplier

    Compression Molded SmCo Permanent Magnets Feature:
    Part No.:  MPCO-BCSM series
    Type: Permanent
    Composite: Compression & Injection Samarium Cobalt Magnet (Rare Earth SmCo)
    Size / Shape: Customized design drawing
    Application: Motors, Devices, Printers, Sensors, CD/DVD ROM and so on.
    Packing: cartons / pallets
    Delivery Date: 10-18 days
    Place of Origin: Zhejiang, China (Mainland)

    Bonded Samarium Cobalt is the highest grade of material that can either be made by using nylon 12 or compression molded using epoxy. It was developed by Seiko Epson Corporation and can be made radial up to 15 Mgoe, cross field up to 17 Mgoe, and axially by similar method for 15 Mgoe. Typically used in high quality stepping motors, this material has been in the market place for over 20 years and MPCO has yet to have a reject of any kind.

    Samarium Cobalt Compression Bonded Magnets are one of the newest types of magnetic materials and are made by compressing an epoxy coated SmCo magnet powder into a final shape and then heat treating it. The result is a high density material which produces a higher magnetic output than by injection molding. Although compression molding provides greater flexibility in geometry shape and size, they do not provide the range of complex geometries which can be achieved by injection molding. The following tables list common grades, however custom grades can be made depending on customers’ requirements. Compression Bonded SmCo Magnets

    Permanent Compression Bonded Samarium Cobalt Magnets

    Permanent Compression Bonded Samarium Cobalt Magnets

    Due to different manufacturing processes these materials (excepting C1) are sourced off-shore for the convenience of our customers. Secondary operations (ie. machining, magnetizing and inspection) are performed here. Ceramic/Bonded are least strong of these grades, of the rare earth magnets, NIB is strongest while SmCo has better temperature characteristics. AlNiCo has the best temperature characteristics, although is less strong than rare earths and is easily de-magnetized.

    Anisotropic bonded NdFeB permanent magnets have wide potential applications in the areas such as brushless DC motors, spindle motors, and stepping motors due to their excellent processing property and high magnetic properties. Anisotropic NdFeB bonded magnets prepared by hydrogen-disproportionation–desorption-recombination (HDDR) process have large energy product at room temperature. However, they are not stable at ∼100°C, which is the working temperature of many electric motors. In order to improve their thermal stability, we developed bonded NdFeB/SmCo magnets and investigated the effects of powder particle size and SmCo content on their magnetic properties. We proposed a model to clarify the filling effect of the powder, which played a key role in the enhanced (BH)max when reducing the SmCo particle size. As for the SmCo content, the bonded magnets showed improved (BH)max at 100°C-150°C and thermal stability with the increase of SmCo content. And through adjusting the SmCo content, the remanence temperature coefficient and coercivity temperature coefficient from 25-150°C were able to be regulated in the range of -0.14%/°C to -0.04%/°C and -0.51%/°C to -0.14%/°C, respectively. This work provides a design strategy and a facile route to improve the magnetic properties and thermal stability of the bonded magnets.

    Compression Bonded SmCo Permanent Magnets

    Compression Bonded SmCo Permanent Magnets

    MPCO offers both compression bonded 1:5, and 2:17 SmCo magnets. They have lower energy products than sintered SmCo – currently in the range of 4.0 to 10.0 MGOe.
    Polymer samarium cobalt magnets with SmCo magnetic powder mixed with polymer materials, compressing through the shaped die, various shapes of high dimensional accuracy can be produced, requiring no further finish machining. Due to excellent corrosion resistance, coating is not required.

    Remanence Coercive
    Br Hc Hci (BH)max
    kGs mT kOe kA/m kOe kA/m MGOe kJ/m
    BCS-4 3.8-4.2 380-420 2.5-3.5 200-280 8.0-13.0 640-1030 3.5-4.5 28-36
    BCS-5 4.1-5.4 410-540 3.3-4.5 265-360 8.0-15.0 640-1200 4.5-5.5 36-44
    BCS-9 6.1-6.6 610-660 5.2-6.0 415-480 8.0-15.0 640-1200 8.5-9.5 68-76
    BCS-11 6.4-7.2 640-720 5.4-6.4 430-510 8.0-15.0 640-1200 9.5-11.0 76-88


    Reversible Temperature
    Max Working Temp. Curie Temperature
    %/°C Tmax Tc
     Bd Hd °C °C
    BCS-4 -0.035 -0.29 150 700
    BCS-5 -0.035 -0.29 150 700
    BCS-9 -0.035 -0.29 150 700
    BCS-11 -0.035 -0.29 150 700