Samarium Cobalt Magnet

Description

Samarium magnets are inter metallic compounds made from samarium as rare earth elements and cobalt. With performance superior to any other magnets currently available, they are known as the “ultimate magnets.”

SmCo5 and Sm2Co17 are the most common elements.

In particular for high temperature applications, its high maximum energy product and coercive force allow the design of very compact and highly efficient devices.

Samarium Cobalt magnets are manufactured through powder metallurgy processes therefore in order to use it most economically, consideration of magnet shape and material grade are important.

Applications

  • Speakers (Ear phones, Head phones)
  • Motors (Stepping, Coreless, Servo)
  • Switches, Sensors, Relays
  • Actuators
  • Electric Watches, Gauges
  • Others (Printers, Toys)
  • High Temperature Applications
Curie Point ~770°C
Maximum Permissible Temperature ~200°C
Density ~8.5g/cm³
Hardness HRC 50~60
Electrical Resistance 50μW cm

Temperature Coefficient

~0.016%/°C

Standard Rating Characteristics of SmCo Magnets

Techno

Mag

Code

Residual flux density

Coercive force

Maximum energy product

Br

Hc

iHc

(BH) Max.

KG

T

Oe

KA/m

Oe

KA/m

MG • Oe

KJ/m³

TM-23B

9.4-10.4

0.94-1.04

5.0-8.5

398-676

>5.3

>421

19-24

151-191

TM-23CV

9.5-10.5

0.95-1.05

7.5-10.0

597-796

>8.0

>636

20-26

159-207

TM-23BV

10.2-11.2

1.02-1.12

6.5-8.5

517-676

>7.0

>557

22-26

175-223

TM-25B

10.2-11.0

1.02-1.10

5.0-8.5

398-696

>5.3

>421

22-27

175-215

TM-30CH

10.4-11.4

1.04-1.14

8.0-10.0

636-796

>8.5

>676

25-31

199-247

TM-30BH

11.0-12.0

1.10-1.20

6.5-9.0

517-716

>7.0

>557

27-33

175-263

TM-20SV

8.8-9.8

0.88-0.98

8.0-9.5

636-756

>14.0

>1114

18-22

143-175