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There are several measurements that affect the strength of the permanent magnet, which often seems confusing. Magnetic field strength (residual magnetism), resistance to demagnetization (coercivity) and tensile force are usually summarized as strength, all of which are ideal properties of permanent magnets.
The single main indicator of the strength of a permanent magnet is its maximum energy product measured in Megagauss Oersteds (MGOe). The higher the maximum energy product value, the larger the magnetic field generated by the magnet in a particular application.
The maximum energy product, also called BHmax, is calculated by multiplying the magnet's remanence (Br) and coercive force (Hc). The strongest magnets in the world are neodymium magnets. They come in different grades, but each grade has a convenient name that allows you to immediately judge which magnet is stronger. Commercially available neodymium magnets range from N35 to N52; the number after the letter "N" represents the maximum energy product of the magnet.
The individual properties of magnets will change due to temperature. Certain types of magnets perform better than others at high temperatures, such as Alnico magnets and Samarium Cobalt magnets.
In a high temperature environment, the five magnetic materials lose their magnetism at different speeds and have different maximum operating temperatures. If the temperature exceeds the maximum operating temperature of a single class, it will be permanently demagnetized.
In short, through proper maintenance and storage of magnets, permanent magnets can maintain their strength forever. However, if it is exposed to certain conditions, it will also lose its "permanent" magnetism. Ultimately, determining whether a permanent magnet will lose its magnetism over time depends on its specific application.
How to measure the magnetic field strength of a magnet?
You can use a Gauss meter to determine the strength of a magnet, you can use a Tesla meter to measure the magnetic field, a flux meter to measure the magnetic flux, or a tensile tester.
Permanent magnets that our company can provide;
Articles related to the strength of permanent magnets;
What is the magnetic strength of the N52 super magnet?
Introduction to the strength of ceramic ferrite
Will the magnet coating (plating) affect the magnetic strength of the magnet?
This is an ultra-small ferrite block magnet, small and thin, with a thickness of only 0.8mm, a length of 3.8mm, and a width of 2mm. It is mainly used for precision electronics, Hall sensors, and is magnetized in the direction of 2. The strong magnetic surface is the length If you are interested in this kind of small ferrite magnets, you can contact us to customize without pressure!...
This is the courage magnet manufacturer to provide you with a anisotropy multi-pole ferrite ring magnet, through the side (radial) 12 pole magnetization, the surface magnetic is about 1050 gauss, its size is 28.4mm outer diameter, 17.5mm inner hole, thickness of 4mm...
This product is a ring-shaped ferrite magnet with an outer diameter of 20mm, an inner diameter of 10mm, and a thickness of 3mm. There is no coating on the outside. The magnetizing method is axial/planar 4 poles and the surface magnetic field strength is about 980gs. If you are interested in this magnet, please contact We provide you with samples, and other specifications are needed. We can also provide you with more magnetic poles....
Sample shot is a small and thin radial neodymium magnet ring, belongs to rare earth magnets, zinc-plated surface, outer diameter 6.5mm, inner hole diameter 3.5mm, thickness 0.5mm, through the diameter of the direction of the magnetization...
You are now seeing this is a non-standard customized sintered ceramic ferrite magnets, thickness 9mm, 14 pieces of a group, made of high grade Y33 grade or more, with strong magnetic strength, widely used in a variety of micro-motors, power tool motors, sports equipment motors...
The magnet is a multipolar Ndfeb magnetic ring, the material is bonded neodymium magnets, there are 12 magnetic poles, using the radial inner diameter magnetization, the use of surface for the inner side, the outer diameter of the ring magnet is 28mm, the inner diameter of 24mm, the height of 10mm, the surface black electrophoresis, the measured surface magnetic field intensity of about 2680 Gauss...
This product is provided by China's neodymium magnet manufacturer, The shape is a circle disk, sintered neodymium material, the magnet diameter of 30mm, thickness of 10mm, axial (thickness) magnetization, nickel plated surface, weight of 8.96g, surface magnetic field strength is greater than 4500 Gaos, tension about 2.8kg,...
This is a medium-sized ring neodymium magnet. The specific material is bonded neodymium iron boron. It is a magnet that needs to be pressed by mold. The size of the magnetic ring is 45.9mm in outer diameter, 41.4mm in inner diameter, and 13mm in height. radial inner diameter magnetization 10 poles, The surface is black epoxy coating. It is mainly used for various permanent magnet DC motors. Brushless motors。...