Aluminium, nickel, cobalt, copper, iron, trace titanium, and other metal elements are used to make alnico magnets. They are highly resistant to corrosion and high temperatures. The maximum operating temperature is 550°C. Alnico magnets are widely used in biometrics, motors, sensors, and other industrial applications. Aerospace, military, automotive, and security systems are just a few examples of application areas. Alnico magnets can be formed into a wide range of shapes. Square sculptures, rounds, horseshoes, round rods, suction, and so on are the most common. Some of them are paintable.
Neodymium bar magnets are widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. The more common ones are permanent magnet motors, speakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment and instruments. Many friends who are in contact with magnets for the first time may not know the specific difference between the two types of magnets. Let's take a look together next.
Strong neodymium bar magnets are easily oxidized due to the metal-containing neodymium and require surface electroplating. Alnico magnets have better corrosion resistance and usually do not undergo surface treatment.
The fracture of the two products is different. Neodymium bar magnets are excellent tiny crystals, while alnico magnets have rougher cross-sections and larger crystal grains. ,
Neodymium bar magnets are usually resistant to 80°C. Alnico magnets are at 300-500°C. Alnico magnets demagnetize at temperatures exceeding 600°C, so we generally say that the working temperature of alnico magnets is less than or equal to 550°C.
Alnico magnets are high-temperature resistant magnets, but their magnetism is very weak. The higher the high-temperature resistance of the magnet, the weaker the magnetic force. The magnetic force is inversely proportional to the temperature resistance. Like ferrite, ferrite is also more resistant to high temperatures than neodymium bar magnets. Neodymium bar magnets are 7.5-7.6g/cm3, and alnico magnets are 7.3-7.4.
Due to its strategic resources of cobalt and nickel, alnico magnets are expensive and have few users. Many customers choose Neodymium bar magnets instead. Alnico magnets are mostly used in aerospace, military, automotive industry and security systems.
The above is the difference between alnico magnets and neodymium bar magnets. The difference in appearance is more direct, fast and straightforward. Do you get it?
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