There are 5 main magnetic materials available, in order of magnetic power from weak to strong: rubber magnets, ferrite magnets, Alnico magnets, SmCo magnets and NdFeB magnets. The following is a brief description of the characteristics of each material to help you choose the right magnet.
1、Rubber magnet
The material of the magnet is very similar to rubber, it can be folded, curled and cut by scissors, and the color of the material is dark brown. The surface can also be affixed with PVC adhesive paper or coated with glue. The width of each roll is up to 75mm, length 100m, standard thickness 1.5mm, and the width of square sheet is up to 600mm, length 30m, standard thickness 0.5 and 0.75mm. magnets can be made into two sides with adhesive for easy use. Crafts, sign boards, display boards, magnetic calendars, business cards, phone books, etc.
2、Ferrite
Widely used magnets, cheap, but relatively strong magnetism compared to rubber magnets. The material itself is hard and brittle, with dark gray surface. Round piece shape, circle shape, square shape, tile shape. There are many sizes available for crafts, adsorption parts, toys, motors, speakers, etc.
3、Alnico and samarium cobalt magnets
Early application of magnetic materials in the field of technology. Can be used at very high temperatures, nearly 500 degrees Celsius. After processing, the surface is stainless steel-like bright color. Round flake, cylindrical, square, horseshoe, etc. Instruments, meters and high temperature environment samarium cobalt rare earth magnets, the material is very brittle, but high temperature resistant, can be used at 300 degrees Celsius. Round piece shape, circle shape, square shape, tile shape. Various sizes are available.
4、Neodymium iron boron
It is a high performance rare earth magnet, not as brittle as samarium cobalt, but not as high temperature as samarium cobalt magnet. It is very easy to oxidize at room temperature, so the surface must be plated. Round, ring, square and tile shapes. NdFeB magnets are the most powerful magnets available today and are increasingly used in non-technical fields such as adsorption magnets, toys, jewelry, etc.