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AlNiCo Magnets

AlNiCo Magnets

Category: AlNiCo magnets/metal perpament magnets

Advantages:  high magnetic energy, good temperature stability

Disadvantages: very low coercive force,easy to be demagnetized, magnetic circuit design can not use thin disc magnets, and must be assemblied first then overall magnetized 

Product Description

AlNiCo magnet is the earliest developed permanent magnetic material, it is an alloy of Al, Ni, Co, Fe and another rare metal element. AlNiCo permanent magnets birthed in 30 years of 20 Century, its magnetic property is best in the years, so it was most widely used in permanent magnetic motors. But that application in motors was replaced step by step when ferrite permanent magnets and rare earth magnets produced. And the proportion of AlNiCo application for motors went down. For AlNiCo magnets, the ability of corrosion resistant is good, surface treatment is not needed for it. It usually made into cylinder AlNiCo magnets or block AlNiCo magnets. The advantages of AlNiCo magnets are high remanence (maximum up to 1.35T) and low-temperature coefficient(-0.02%/℃), maximum working temperature is around 520℃, the magnetic properties change caused by temperature change is very small. The disadvantages of AlNiCo are low coercivity (normally lower than 160KA/m), and the demagnetize curve is not linear, it is easy to be magnetized and also easy to be demagnetized.

According to the different production methods, it classified as sintered AlNiCo magnets and cast AlNiCo magnets. Cast AlNiCo can be machined into different shapes and sizes, for all kinds of permanent magnets, cast AlNiCo magnets have the lowest Temp.Coefficient, its working temperature can be up to 600 degrees.  Cast AlNiCo magnets are used for kinds of instruments and meters, auto parts,electric-acoustic, teaching field etc.

Compared with cast AlNiCo magnets, sintered AlNiCo magnets suit for making complex shapes and smaller sizes,the size tolerance for sintered AlNiCo magnets is smaller and better than cast AlNiCo magnets. For sintered AlNiCo magnets, the process is simple and it can be pressed into needed size directly.The property of sintered AlNiCo magnets is lower than cast AlNiCo magnets, but sintered AlNiCo magnets more suitable for machine.Sintered AlNiCo magnets are wide used on instruments and meters, comm unicate,magneto-electricity switch, and kinds of transducers.

Type

(BH)Max

Br

Hcb

D

a(Br)

Tc

Tw

KJ/cm3

MGOe

mT

Gs

KA/m

Oe

g/cm3

﹪/K

LN9

9.0

1.13

680

6800

30

380

6.9

-0.03

760

450

LN10

10.0

1.20

600

6000

40

500

6.9

-0.03

760

450

LNG12

12.4

1.55

720

7200

45

500

7.0

-0.03

810

450

LNG13

13.0

1.60

700

7000

48

600

7.0

-0.03

810

450

LNG34

34.0

4.30

1200

12000

48

600

7.3

-0.02

860

525

LNG37

37.0

4.65

1200

12000

48

600

7.3

-0.02

860

525

LNG40

40.0

5.00

1250

12500

48

600

7.3

-0.02

860

525

LNG44

44.0

5.50

1250

12500

52

650

7.3

-0.02

860

525

LNG52

52.0

6.50

1300

13000

56

700

7.3

-0.02

860

525

LNGT28

28.0

3.50

1000

10000

58

720

7.3

-0.025

860

550

LNGT36J

36.0

4.50

700

7000

140

1750

7.3

-0.025

860

550

LNGT32

32.0

4.0

800

8000

100

1250

7.3

-0.025

860

550

LNGT40

40.0

5.0

800

8000

110

1380

7.3

-0.025

860

550

LNGT60

60.0

7.50

900

9000

110

1380

7.3

-0.025

860

550

LNGT72

72.0

9.00

1050

10500

112

1400

7.3

-0.025

860

550


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