Powerful magnets refer to NdFeB magnets. Compared with ferrite magnets, AlNiCo, and SmCo, its magnetic properties greatly surpass other types of magnets. NdFeB magnets can absorb 640 times their own weight, so NdFeB magnets are often used by outsiders. Called a strong magnet.
Magnetic energy product BH: It represents the magnetic energy density established by the powerful magnet in the air gap space (the space between the two magnetic poles of the powerful magnet), that is, the static magnetic energy per unit volume of the air gap. Since this energy is equal to the product of Bm and Hm of a strong magnet, it is called the magnetic energy product.
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The performance and quality of powerful magnets are better than ferrites. The powerful NdFeB magnets can absorb 640 times more weight than themselves, which is why they are called "Magnet King".
NdFeB magnets are very easy to corrode. Therefore, most finished products need to be plated or coated. Conventional surface treatment includes: nickel plating (nickel copper nickel), zinc plating, aluminum plating, electrophoresis, etc.
NdFeB strong magnets are devices that convert changes in the magnetic function of active components caused by magnetic fields, currents, stress and strain, temperature, light, etc., into electrical signals, and use this method to view the corresponding physical quantities.