Alnico Magnets are ideal for corrosive and high heat applications up to 500°C.
Stronger than Ceramic / Ferrite magnets although not as strong as Neodymium magnets as a result, Alnico magnets are versatile, durable and cost effective.
These magnets exhibit a high degree of corrosion resistance and are typically employed in applications with no coatings or plating.
The lower coercive force of Alnico makes magnetizing a simple matter in most cases.
Handling and Storage of Alnico Magnets:
Alnico magnets require appropriate handling and packing to ensure safety and prevent damage.
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Alnico is a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence acronym al-ni-co. They also include copper, and sometimes titanium. Alnico alloys are ferromagnetic, and are used to make permanent magnets. Before the development of rare-earth magnets in the 1970s, they were the strongest type of permanent magnet.
Alnico alloys can be magnetised to produce strong magnetic fields and has a high coercivity (resistance to demagnetization), thus making strong permanent magnets. Of the more commonly available magnets, only rare-earth magnets such as neodymium and samarium-cobalt are stronger. They produce magnetic field strength at their poles as high as 1500 gauss (0.15 tesla), or about 3000 times the strength of Earth’s magnetic field.
Alnico alloys have some of the highest Curie temperatures of any magnetic material, around 800 °C (1,470 °F), although the maximal working temperature is normally limited to around 538 °C (1,000 °F).They are the only magnets that have useful magnetism even when heated red-hot. This property, as well as its brittleness and high melting point, is the result of the strong tendency toward order due to intermetallic bonding between aluminium and other constituents. They are also one of the most stable magnets if they are handled properly. Unlike ceramic magnets, Alnico’s are electrically conductive,
Alnico magnets are widely used in industrial and consumer applications where strong permanent magnets are needed; examples are electric motors, electric guitar pickups, microphones, sensors, loudspeakers, magnetron tubes, and cow magnets. In many applications they are being superseded by rare-earth magnets, whose stronger fields (Br) and larger energy products allow smaller-size magnets to be used for a given application.