AlNiCo magnets
AlNiCo magnets are permanent magnets. They are an alloy of aluminum (Al), nickel (Ni), and cobalt (Co). Their greatest added value is their high-temperature resistance up to 450 °C. They are also resistant to the outdoor environment, especially to corrosion and acids. The properties mentioned above give possibilities for their application. They are weaker than neodymium magnets - they have less magnetic strength but are not as fragile.
Basic advantages of AlNiCo magnets:
- High maximum working temperature
Alnico magnets can be used even at 450°C, which is an exceptional feature compared to other permanent magnets. - High corrosion resistance
AlNiCo magnets are corrosion resistant, i.e. no surface treatment is required. - Acid resistance
AlNiCo magnets are acid resistant and thus suitable for applications in demanding environments. - Long lifetime
Ifused properly, AlNiCo magnets have a long lifetime and can last for many years.
Comparison of different types of permanent magnets
A basic comparison of the different types of permanent magnets can be found in the table as follows.
| Magnet type | Holding force | Temperature resistance | Price | Chemical resistance | Corrosion resistance |
|---|---|---|---|---|---|
| Ferrite magnet |  |
250 °C |  |
 |
|
| Neodymium NdFeB magnet | |
80 - 230 °C |  |
|
|
| Samarium SmCo magnet | |
350 °C | |
|
|
| AlNiCo magnet | |
450 °C | |
|
|