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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 product is a convex neodymium magnet with holes, which is a non-standard customized special-shaped magnet. It is provided by the Karich magnet manufacturer in China. You can determine the size, grade, coating, and resistance of the convex magnet according to the needs of your own products. Wen, we are very much looking forward to your inquiry....
This product is a round ceramic magnet with a diameter of 5mm and a thickness of 3mm. It is a small round magnet. It is provided by the Karich magnet manufacturer in China. It is suitable for electronic components, sensors, instruments, and electronic products. Corrosion, cheap and other characteristics....
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Most of the epoxy magnets we have seen are black, that is, black epoxy magnets. In fact, it can also have other colors, such as gray, red, blue, green, etc. If you like this kind of magnet, please give us feedback. The size and performance grade can be customized....
This is a kind of heterosexual ferrite magnet provided by Chinese Carici magnet factory, black, the size is 13.8mm in diameter, 4.9mm in thickness, the direction of thickness magnetization, one side of the magnet has a concave point for filling glue, mainly used for magnetic clamp, customers interested in this product welcome to email to consult....
Customers from the United States, the United Kingdom, Australia, Japan, Poland and other customers are looking for ferrite cylindrical magnets. Welcome to contact the Courage magnet manufacturer. Our company is located in Dongguan, China. There are many ready-made sizes and low prices. Like the main picture...
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