Alnico magnets, composed of primarily aluminum, nickel, and cobalt, were developed in the 1940's. This class of magnet remains a preferred material because of it's excellent temperature stability, high magnetic flux density, and resistance to corrosion. Alnico magnets are manufactured through a casting or sintering process. The casting process allows for the magnet to be manufactured into intricate and complex shapes, which are not possible with other magnetic materials.
Alnico Magnets Overview
Alnico magnetic material is an alloy of aluminum-nickel-cobalt which possesses an excellent temperature stability and high residual induction. However, its low coercive force limits its applications in many cases. Casting and sintering are two major processes used to manufacture the Alnico magnets.
Key Advantages
Excellent temperature stability
Strong corrosion resistance
The maximum working temperature is up to 500°c
Excellent capacity
High density and magnetic properties
Shorter production lead time
Temperature factor of Br is the smallest among all the permanent magnets
Cast Alnico magnets can be produced in relatively complex shapes
Tooling for cast Alnico magnets is relatively low, since sand molds are generally used for the casting process.
Guitar pickups parts introduction
We supply AlNiCo II,III,and V and Ceramic 8, for Guitar pickups, Included block AlNiCo magnet and rod magnets of course finished Guitar pickups according to your design.
The following chart shows the respective magnets's properties:
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|
Material |
Br(KGs) | Hcb(Oe) | Hcj(Oe) | Bhmax(MGOe) | Density(g/cm3) |
| Alnico2 | 7.0 | 600 | 630 | 1.6 | 7.2 |
| Alnico3 | 6.5 | 550 | 550 | 1.2 | 7.2 |
| Alnico5 | 12.0 | 600 | 600 | 5.0 | 7.3 |
| Ceramic8 | 3.9 | 3000 | 3200 | 3.5 | 4.8 |
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