AlNiCo Bar Sensor Magnets

Type:AlNiCo Bar Sensor magnets
Samples:Available
MOQ:Depending on the size of the magnet
OEM service:Yes
Shipping:Air, Sea, Fast Express
Payment:PayPal, TT, L/C
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Product Details


Introduction of Alnico magnets


Alnico is an alloy produced by mixing aluminum, nickel and cobalt with certain addition of other metals like copper, iron and titanium. Capable of producing a strong magnetic field, it has excellent linear temperature characteristics and has wide industrial applications.

Alnico magnets are of different types depending upon the processing techniques and applications. Alnico's are popular alloys of aluminum, nickel, cobalt with a certain tint of iron. These magnets are powerful permanent magnets which can be carved into various shapes and sizes and then used in various applications.

alnico magnets
alnico rod magnets



alnico sensor magnets.jpg

Characteristics

The bar alnico has the following characteristics:

  • Alnico bar magnets have good thermal stability and are very suitable for high heat applications.

  • They have maximum working temperature which varies between 975 degrees to 1020 degrees.

  • Since they are hard and brittle, they cannot be subjected to conventional machining.

  • As compared to ceramics they have high residual induction and energy product.

  • If compared to ceramics and rare earth materials they have low coercive force.


Manufacturing Process

Casting or sintering process is applied for making alnico magnets. The first step involves the pouring of molten metal alloys into molds. Later it is passed through various heat cycles. The resultant magnets have a rough surface which after machining gives a glossy look.
Sintered magnets are produced by compacting fine alnico powder in a press, and then sintering the compacted powder into a solid magnet.
Alnico magnets can only be magnetized only in the field having magnetizing fields of about 3 kOe. Since these magnets have low coercivity they must be protected from the adverse repelling fields as this could partially demagnetize the magnets.

Magnetizing

After the tolerance magnetizing is effected. As alnico magnets are brittle, they must be protected from hard blows and handled with care. It should be magnetized in a proper magnetic field and must be prevented from the repelling fields as it is prone to demagnetization.


Physical Properties

Curie temperature

860

Max.Operating Temp.

525-550

Resistivity

47-54

Hardness

520-630

Density g/cm3

6.9-7.3

Rev. Recoil Permeability

1.7-4.7

Saturation Field Strength kOe

2.7-6.3

Temp.Coefficient of Hc

-0.01-0.03


Applications

Alnico magnets have applications in the following areas:

  • Electric motors

  • Electric guitar pickups

  • Sensors

  • Loudspeakers

  • Cow magnets

  • Automotive and electronic sensors

  • Actuators

  • Hall effect sensors

  • Magnetron

  • Reed switches

  • TWT amplifiers

  • Communication


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