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How to Choose High Quality Strong Magnets
Time： 2023-03-17
A core component of a powerful magnet is a permanent magnet material that can generate a magnetic field in the surrounding space without the need for external energy. Among all permanent magnet materials, neodymium iron boron (NdFeB) is a high-performance material and is currently widely used. Iron boron materials are obtained by melting, crushing, pressing, sintering, processing, and magnetizing the raw materials, and the important neodymium oxide in the raw materials is the leading variety among various rare earth resources with recent skyrocketing prices.
The composition of magnetite is composed of atoms such as iron, cobalt, and nickel, and the internal structure of its atoms is relatively unique, with inherent magnetic moments. Magnets can generate magnetic fields and have the characteristic of attracting ferromagnetic substances such as iron, nickel, cobalt, and other metals.
Type of magnet: Shape magnet: Square magnet, tile magnet, irregular magnet, cylindrical magnet, ring magnet, disc magnet, magnetic rod magnet, magnetic frame magnet, attribute magnet: Samarium cobalt magnet, neodymium iron boron magnet (strong magnet), ferrite magnet, aluminum nickel cobalt magnet, iron chromium cobalt magnet, industry magnet: magnetic components, motor magnet, rubber magnet, plastic magnet, and other types. The magnet is divided into permanent magnet and soft magnet. The permanent magnet is added with strong magnet, so that the spin of the magnetic material and the electronic angular momentum are arranged in a fixed direction. The soft magnet is added with electricity. (It is also a method of adding magnetic force) When the current is removed from the soft iron, it will gradually lose its magnetism.
Tips for selecting neodymium iron boron strong magnets
1、 Firstly, you need to know the working environment of the magnet you are using?
2、 Another issue is how to select the required coating for the magnet based on the external environment.
3、 What are the requirements for the magnetic force of a magnet and the temperature requirements for a strong magnet?
4、 Consistent stability of magnetic force, raw material channels?
In terms of strong magnets, you can choose the material grade based on your specifications. The temperature is specific, below 80 degrees Celsius, choose the N series, and above 80 degrees Celsius, there are H series, which can withstand 120 degrees Celsius; SH series, resistant to 150 degrees; UH series, resistant to 180 degrees; EH and AH above 200 degrees.
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Processing and Hazards of Samarium Cobalt Magnets
Production process of samarium cobalt magnets: Ingredients → melting and ingot making → powder making → pressing → sintering and tempering → magnetic testing → grinding processing → pin cutting processing → finished product. These alloys are usually processed in a non magnetized state. Samarium cobalt is finely ground using wet grinding (water-cooled heat dissipation) and diamond grinding wheels.
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