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|