There are different types of magnet, depending on the material they are made of: ferrite, neodymium, samarium and alnico. Ceramic magnets (ferrite) have a wide range of applications in all kinds of industry. Thanks to the quality-price relationship, this is perhaps one of the most used materials. This type of magnet offers good behaviour at high temperatures (up to 250ºC) and good resistance to demagnetisation. Rare earth magnets (neodymium and samarium) are the most powerful ones on the market. This factor increases their field of application when space is limited or when a strong magnetic field is required. Neodymium magnets can stand maximum working temperatures between 80ºC and 200ºC and samarium-cobalt ones between 250ºC and 350ºC. Due to the hardness of this kind of material, they can only be machined and worked with diamond tools. Alnico magnets are made of an alloy of aluminium, nickel and cobalt. This material offers good behaviour at high temperatures (up to 425ºC). Alnico magnetic bases offer a wide range of applications in the industrial world. Plastic magnets are the result of combining thermoplastic binders and magnetic materials (ferrite, NdFeB and SmCo). Manufacturing can be by injection, pressing, extrusion or calendering.
IMA has special magnets suitable for each company’s needs and designs. Such products are found in our Special magnets section in Engineering and control.