Research & Development

Development of High Magnetic Energy Product Samarium-Cobalt Magnet

Development of High Magnetic Energy Product Samarium-Cobalt Magnet

Toshiba Materials manufacture Samarium-Cobalt magnet as rare earth sintered magnet that excel in temperature property. Lineup of our Samarium-Cobalt magnet include high flux density type to high coercively type depending on customer applications. Currently, we are advancing with development of high energy product type new material TS-32H(Perpendicular magnetic field press type) and TS-30H(Parallel magnetic field press type).

Features

  • 10% improvement of maximum energy product BHmax (against conventional product)
  • Intrinsic coercive force iHc to be set around 1,200kA/m where magnetization is relatively easy after assembly to rotors etc.

Application

  • Automotive Magnet (electrical motor, rotation sensor, etc.)
  • Industrial motor, compact motor, actuator
  • Sensors
  • Magnet Coupling etc.

Price of Neodymium magnet, which is currently main material for rare earth magnet is significantly increasing due to recent price increase of rare earth raw material, especially Dy (dysprosium) that is added to improve thermal resistance. Because Samarium-Cobalt magnet does not include Dy, price is relatively stable and increased number of customers are reconsidering use of this material.

Magnetic Characteristics of TS-32H,TS-30H

Material by Toshiba code
(Press Type)
Residual flux density
Br [T]
Coercive force Maxmum energy product
(BH)max [kJ/m3]
bHc [kA/m] iHc [kA/m]
TS-32H
(Perpendicular Magnetic Field Press)
1.12-1.20 715-875 795-1350 230-255
TS-30H
(Parallel Magnetic Field Press)
1.07-1.15 675-850 795-1350 215-240

Demagnetization Curve-Temperature Relation of TS-32H

Demagnetization Curve-Temperature Relation of TS-32H

Demagnetization Curve-Temperature Relation of TS-30H

Demagnetization Curve-Temperature Relation of TS-30H

Product Info: Samarium-Cobalt Magnet(TOSREX®)

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