Like other products, magnets also have multiple appearances. When it comes to black circular magnets, which type of magnet comes to mind first? It could be……
Sintered Ferrite Magnets
This is a lower cost permanent magnet material known as a black magnet because of its usually black color. Ferrite magnets have good magnetic properties and corrosion resistance, and are suitable for a wide range of environmental conditions. They are often used to make round pieces or other shapes of magnets.
The most common black round magnet - Ferrite Disc Magnets
Black epoxy coated neodymium magnets
Aren't neodymium iron boron magnets usually silver-white? Yes, but in some special environments, in order for the magnets to be more resistant to corrosion, the surface of these magnets is often coated with a black plating, also known as a black epoxy coating.
Sample Column; Epoxy Coated Magnets
Flexible Rubber Magnets
These magnets are made from magnetic powders mixed with polymers (such as plastic or rubber) and can be processed by injection molding, extrusion, etc. into different shapes, including round magnets.
Sample image: Rubber self adhesive disc magnet D50 x 1.5mm [sale uses price]
The above three are the most common and most likely 3 types of round black magnets. Each type of black round magnet has its own unique characteristics and applications, for applications that require a strong magnetic field strength, you can choose neodymium-iron-boron magnets, while for cost-sensitive applications, you can choose ferrite magnets.
Other magnet knowledge;
3 types of ferrite permanent magnets and their characteristics
3 Commonly Used Types of Neodymium Magnets
Difference between isotropy and anisotropy of rubber magnets