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Smco Magnet

Introduction of SmCo Magnet

SmCo(Samarium Cobalt) magnet is a kind of material made from rare earth metal samarium and cobalt, which features of high performance, low temperature coefficient, good temperature stability and strong corrosion resistance. When working above 180 degree centigrade, its maximum energy product BH and steady temperature are superior than NdFeB magnetic material. Due to its strong corrosion resistance, SmCo magnet need not to be coated since it is difficult to be eroded and oxidized.
SmCo magnet is widely used in space probe, national defense and military, microwave appliance, communication, medical equipments, motors, instruments, various magnetism spreading devices, sensor, magnetic processor, magnetic lifter and so on.

 

SmCo1:5 magnet is also named SmCo5, which is prorated with metallic samarium, cobalt and metallic praseodymium. The (BH) max range is from 16 to 25, maximum working temperature 250°C. The physical character and ductibility of SmCo5 is better than Sm2Co17, so SmCo5 is slightly easier to be machined with complex shapes and thin thickness of disc or ring, while Sm2Co17 is more brittle. Magnetization magnetic field of SmCo5 is lower compared with Sm2Co17. In general, SmCo5 can be magnetized saturated by 4000Gs magnetic field, however, magnetizing Sm2Co17 with high Hcj value need more than 6000Gs magnetic field. For some reasons, the price of SmCo5 is more expensive than Sm2Co17. According to different applications and using requirements, customer can choose SmCo5 or Sm2Co17 reasonably. .

SmCo2:17 magnet (Sm2Co17) is mainly prorated with metallic samarium, cobalt, Copper, iron and zirconium. The (BH) max range is from 20 to 32, maximum working temperature 350°C. Sm2Co17 bears extremely low temperature coefficient and preferably anti-causticity. When working in high-temperature environment, magnetic properties of SmCo magnet is better than NdFeB magnet. Thus, SmCo magnets are widely used in fields such as aeronautics and space, national defense and sensors. Because of great brittleness of Sm2Co17 materials, it is not suitable for complex shapes and disc or ring with thin thickness. Also due to this character, there may be some appearance defects such as small chips during production, inspection and magnetizing process. However, magnetic property will not be affected.

釤鈷磁性能特性 Magnetic Properties of SmCo

材料
(Material)

牌號
(Grade)

Br
剩磁

Hcb
矯頑力

Hcj
內稟矯頑力

 

(BH)max
最大磁能積

TC
居裡溫

TW
最高工作溫度

(Br)
剩磁
溫度係數

Hcj
內稟矯頑力
係數

T

KGs

KA/m  

KOe

KA/m  

KOe

KJ/m3  

MGOe

%℃

%℃

釤鈷 1:5 SmCo5 (Smpr)Co5

YX-16

0.81-0.85

8.1-8.5

620-660

7.8-8.3

1194-1830

15-23

110-127

14-16

750

250

-0.05

-0.3

YX-18

0.85-0.90

8.5-9.0

660-700

8.3-8.8

1194-1830

15-23

127-143

16-18

750

250

-0.05

-0.3

YX-20

0.90-0.94

9.0-9.4

676-725

8.5-9.1

1194-1830

15-23

150-167

19-21

750

250

-0.05

-0.3

YX-22

0.92-0.96

9.2-9.6

710-748

8.9-9.4

1194-1830

15-23

160-175

20-22

750

250

-0.05

-0.3

YX-24

0.96-1.00

9.6-10.0

730-770

9.2-9.7

1194-1830

15-23

175-190

22-24

750

250

-0.05

-0.3

釤鈷
1:5 SmCo5

YX-16s

0.79-0.84

7.9-8.4

612-660

7.7-8.3

≥ 1830

≥ 23

118-135

15-17

750

250

-0.035

-0.28

YX-18s

0.84-0.89

8.4-8.9

644-692

8.1-8.7

≥ 1830

≥ 23

135-151

17-19

750

250

-0.04

-0.28

YX-20s

0.89-0.93

8.9-9.3

684-732

8.6-9.2

≥ 1830

≥ 23

150-167

19-21

750

250

-0.045

-0.28

YX-22s

0.92-0.96

9.2-9.6

710-756

8.9-9.5

≥ 1830

≥ 23

167-183

21-23

750

250

-0.045

-0.28

YX-24s

0.96-1.00

9.6-10.0

740-788

9.3-9.9

≥ 1830

≥ 23

183-199

23-25

750

250

-0.045

-0.28

低溫度係數
釤鈷 1:5 (SmGd)Co5

LTc(YX-10)

0.62-0.66

6.2-6.6

485-517

6.1-6.5

≥ 1830

≥ 23

75-88

9.5-11

750

300

溫度範圍 

Br溫度係數 %℃

20-100℃

 +0.0156%℃

100-200℃

+0.0087%℃

200-300℃

+0.0007%℃

鈰鈷銅鐵Ce(CoFeCu)5

YX-12

0.70-0.74

7.0-7.4

358-390

4.5-4.9

358-478

4.5-6

80-103

10.0-13.0

450

200

 

 

釤鈷 2:17 Sm2 (CoFeCuZr)17

YXG-24H

0.95-1.02

9.5-10.2

692-764

8.7-9.6

≥ 1990

≥ 25

175-191

22-24

800

350

-0.025

-0.2

YXG-26H

1.02-1.05

10.2-10.5

748-796

9.4-10.0

≥ 1990

≥ 25

191-207

24-26

800

350

-0.03

-0.2

YXG-28H

1.03-1.08

10.3-10.8

756-812

9.5-10.2

≥ 1990

≥ 25

207-220

26-28

800

350

-0.035

-0.2

YXG-30H

1.08-1.10

10.8-11.0

788-835

9.9-10.5

≥ 1990

≥ 25

220-240

28-30

800

350

-0.035

-0.2

YXG-32H

1.10-1.13

11.0-11.3

812-860

10.2-10.8

≥ 1990

≥ 25

230-255

29-32

800

350

-0.035

-0.2

YXG-22

0.93-0.97

9.3-9.7

676-740

8.5-9.3

≥ 1433

≥ 18

160-183

20-23

800

300

-0.02

-0.2

YXG-24

0.95-1.02

9.5-10.2

692-764

8.7-9.6

≥ 1433

≥ 18

175-191

22-24

800

300

-0.025

-0.2

YXG-26

1.02-1.05

10.2-10.5

748-796

9.4-10.0

≥ 1433

≥ 18

191-207

24-26

800

300

-0.03

-0.2

YXG-28

1.03-1.08

10.3-10.8

756-812

9.5-10.2

≥ 1433

≥ 18

207-220

26-28

800

300

-0.035

-0.2

YXG-30

1.08-1.10

10.8-11.0

788-835

9.9-10.5

≥ 1433

≥ 18

220-240

28-30

800

300

-0.035

-0.2

YXG-32

1.10-1.13

11.0-11.3

812-860

10.2-10.8

≥ 1433

≥ 18

230-255

29-32

800

300

-0.035

-0.2

YXG-26M

1.02-1.05

10.2-10.5

676-780

8.5-9.8

955-1433

42356

191-207

24-26

800

300

-0.035

-0.2

YXG-28M

1.03-1.08

10.3-10.8

676-796

8.5-10.0

955-1433

42356

207-220

26-28

800

300

-0.035

-0.2

YXG-30M

1.08-1.10

10.8-11.0

676-835

8.5-10.5

955-1433

42356

220-240

28-30

800

300

-0.035

-0.2

YXG-32M

1.10-1.13

11.0-11.3

676-852

8.5-10.7

955-1433

42356

230-255

29-32

800

300

-0.035

-0.2

YXG-24L

0.95-1.02

9.5-10.2

541-716

6.8-9.0

636-955

42228

175-191

22-24

800

250

-0.025

-0.2

YXG-26L

1.02-1.05

10.2-10.5

541-748

6.8-9.4

636-955

42228

191-207

24-26

800

250

-0.035

-0.2

YXG-28L

1.03-1.08

10.3-10.8

541-764

6.8-9.6

636-955

42228

207-220

26-28

800

250

-0.035

-0.2

YXG-30L

1.08-1.15

10.8-11.5

541-796

6.8-10.0

636-955

42228

220-240

28-30

800

250

-0.035

-0.2

YXG-32L

1.10-1.15

11.0-11.5

541-812

6.8-10.2

636-955

42228

230-255

29-32

800

250

-0.035

-0.2

低溫度係數 釤鈷 2:17
(SmEr)2(CoTM)17

LTC

0.94-0.98

9.4-9.8

668-716

8.4-9.0

≥ 1433

≥ 18

167-183

21-23

840

300

溫度範圍 Br

溫度係數 %℃

-50-25℃

+0.005%℃

20-100℃

-0.008%℃

100-200℃

-0.008%℃

200-300℃

-0.011%℃

釤鈷一般物理性能 Typical Physical Properties of SmCo

參數

Parameter

單位

Unit

標準值

Standard Value

居裡溫度(Tc)                   Curie Temperature

800~850

最高工作溫度         Maximum Operating Temperature

250~350

剩磁溫度係數(︱αBr︱)      Temp. Coefficient of Br

%/K

0.03~0.04

內稟矯頑力溫度係數(βHcj)   Temp. Coefficient of Hcj

%/K

-0.2

硬度                                     Hardness

Hv

500~600

電阻率(ρ)                      Electrical Resistivity

Ω·cm

8.5×105

密度(D)                                   Density

g/cm3

8.3~8.5

回復磁導率(μrec)                  Recoil Permeability

/

1.00~1.05

熱傳導率(λ)                    Thermal Conductivity

W/m·K

12

熱膨脹係數             Thermal Expansion Coefficient

(垂直于取向方向)    Perpendicular to the Direction of Magnetization

 

/℃

11×106

熱膨脹係數             Thermal Expansion Coefficient

               (平行于取向方向)   Parallel to the Direction of                                                                   Magne-tization

/℃

8×106

抗壓強度                          Compress Strength

MPa

850

抗彎強度                          Bending Strength

MPa