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Sintered Alnico Magnets-tend To Be Small, Thin, Light And Complex Magnets Sintered Alnico Magnets-tend To Be Small, Thin, Light And Complex Magnets

Similar to other sintered magnets, sintered AlNiCo magnets are manufactured by powder metallurgy technology. Sintered AlNiCo magnets tend to be small, thin, light and complex magnets. In addition to high dimensional accuracy and strict tolerances. It also has superior mechanical strength and machinability. Compared with cast AlNiCo magnets, sintered AlNiCo magnets have higher material utilization, lower composition segregation and magnetic property fluctuation. Its overall magnetic properties are slightly lower than those of cast AlNiCo magnets, so it is not as commonly used as cast AlNiCo magnets.

Cast Alnico Magnets-more Widely Used Alnico Magnets Cast Alnico Magnets-more Widely Used Alnico Magnets

Cast AlNiCo magnets are manufactured by traditional casting process. It is to melt the aluminum nickel cobalt alloy with different components and pour it into the resin sand mold, and then heat treat and cool the solidified material with rough surface. Depending on whether magnetic field orientation is applied during cooling, cast AlNiCo magnets can be divided into anisotropic and isotropic. For cast AlNiCo magnets, the anisotropy is a shape anisotropy, which is related to the slender Fe-Co particles in the Ni-Al matrix arranged parallel to the magnetic field during amplitude modulation decomposition. Therefore, after heat treatment, alnico material will be processed into specific geometry and tolerance. 


Common & Custom AlNiCo Magnet For Sale

Meank manufacturer and supplier the following common alnico magnets:alnico rod, disc, block,ring,bar,side pole rotor, and horseshoe magnet. Precision magnet cutting, grinding, EDM, manufacturing and assembly according to your requirements and your specifications and tolerances.Shorter lengths of full-length rods and bars are available. For best results, the length of alnico shall not be less than five times the cross-sectional diameter.

Application of AlNiCo Permanent Magnets

Until today, AlNiCo magnet is still an important industrial magnet due to its unparalleled temperature characteristics.AlNiCo magnets perform well in applications with operating temperatures above 500 degrees.AlNiCo magnets can be used in instruments, meters, microwave devices, actuators, holding devices, sensors, etc.


Details of AlNiCo Magnets

As a non rare earth metal permanent magnet material, the composition of Aluminum Nickel Cobalt(AlNiCo) alloy magnet is usually 8-13wt% aluminum, 13-28wt% nickel, 5-24wt% cobalt, and the rest is iron. In addition, the enhancement of acicular phase is promoted to improve the intrinsic coercivity, and alloy elements such as copper, titanium and niobium are added to the matrix phase. Aluminum Nickel Cobalt(AlNiCo) magnets once occupied a dominant position in the permanent magnet industry before the birth of rare earth magnets with their strongest magnetic properties. Alnico magnet is famous for its excellent heat resistance / temperature stability, hard and brittle materials, and it is also a magnet with low to medium strength. 


AlNiCo magnets perform well in applications with operating temperatures above 400 degrees According to the manufacturing process, AlNiCo magnets can be divided into cast AlNiCo magnets and sintered AlNiCo magnets. 


Material Grade&Properties Of AlNiCo Magnets

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


Aluminum Nickel Cobalt (AlNiCo) Magnets Manufacture Method

Aluminum Nickel Cobalt (AlNiCo) Magnets Manufacture Method

FAQs for Alnico Permanent Magnets

  • Q

    What are the main features of alnico magnets?

    A

    AlNiCo magnets have high magnetic strength and high energy, but low coercivity. They are less fragile than rare earth magnets, have strong corrosion resistance and excellent temperature stability, and can be used at very high temperatures. By casting or sintering, they can be made into complex shapes (such as horseshoe shape), which can not be achieved by other magnetic materials

  • Q

    Are there processing restrictions for AlNiCo magnets?

    A

    Alnico requires very careful processing & these materials are generally not recommended for structural or decorative purposes. Machining or drilling cannot be done by ordinary methods. AlNiCo magnets are hard and fragile, and are easy to produce debris and cracks. Cutting and grinding shall be carried out before magnetization.

  • Q

    Does alnico magnet deed surface treatments? 

    A

    Because of their excellent corrosion resistance, AlNiCo magnets usually do not need protective surface treatment,

  • Q

    What is the maximum working temperature of the alnico magnet?

    A

    Alnico magnet is the permanent magnet with the strongest high temperature resistance, and its maximum working temperature can reach 550 ℃

  • Q

    What should we pay attention to when using AlNiCo magnets?

    A

    The repulsive magnetic field may partially demagnetize the AlNiCo magnets, and special attention should be paid to ensure that these magnets are not affected by the repulsive magnetic field. If the alnico alloy is partially demagnetized, it is easy to re-magnetize

  • Q

    What are the difference between sintered Al-Ni-Co and cast Al-Ni-Co magnet?

    A

    Cast AlNiCo magnets are available for different sizes and shapes; the sintered AlNiCo magnets are limited to small size, the dimensional tolerance of sintered AlNiCo is better than that of the cast AlNiCo, and the magnetic properties are slightly lower than that of the cast AlNiCo magnets, but the machinability is better

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